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(-) Description

Title :  STRUCTURE OF M-CALPAIN IN COMPLEX WITH CALPASTATIN
 
Authors :  R. A. Hanna, R. L. Campbell, P. L. Davies
Date :  17 Dec 07  (Deposition) - 25 Nov 08  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.40
Chains :  Asym./Biol. Unit :  A,B,C
Keywords :  Cysteine Protease, Inhibitor, Cell Membrane, Hydrolase, Membrane, Protease, Thiol Protease, Phosphoprotein, Protease Inhibitor, Thiol Protease Inhibitor, Hydrolase-Hydrolase Inhibitor Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  R. A. Hanna, R. L. Campbell, P. L. Davies
Calcium-Bound Structure Of Calpain And Its Mechanism Of Inhibition By Calpastatin.
Nature V. 456 409 2008
PubMed-ID: 19020623  |  Reference-DOI: 10.1038/NATURE07451

(-) Compounds

Molecule 1 - CALPAIN-2 CATALYTIC SUBUNIT
    ChainsA
    EC Number3.4.22.53
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPET24D
    Expression System StrainBL21(DE3)
    Expression System Taxid562
    Expression System Vector TypePLASMID
    GeneCAPN2
    MutationYES
    Organism CommonBROWN RAT,RAT,RATS
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116
    SynonymCALPAIN-2 LARGE SUBUNIT, CALCIUM-ACTIVATED NEUTRAL PROTEINASE 2, CANP 2, CALPAIN M-TYPE, M-CALPAIN, MILLIMOLAR-CALPAIN
 
Molecule 2 - CALPAIN SMALL SUBUNIT 1
    ChainsB
    EC Number3.4.22.53
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPACYC177
    Expression System StrainBL21(DE3)
    Expression System Taxid562
    Expression System Vector TypePLASMID
    FragmentUNP RESIDUES 88-270
    GeneCAPNS1, CAPN4, CSS1
    Organism CommonBROWN RAT,RAT,RATS
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116
    SynonymCSS1, CALCIUM-DEPENDENT PROTEASE SMALL SUBUNIT 1, CALCIUM- DEPENDENT PROTEASE SMALL SUBUNIT, CDPS, CALPAIN REGULATORY SUBUNIT, CALCIUM-ACTIVATED NEUTRAL PROTEINASE SMALL SUBUNIT, CANP SMALL SUBUNIT
 
Molecule 3 - CALPASTATIN
    ChainsC
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPET24A
    Expression System StrainBL21(DE3)
    Expression System Taxid562
    Expression System Vector TypePLASMID
    FragmentUNP RESIDUES 571-664
    GeneCAST
    Organism CommonBROWN RAT,RAT,RATS
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116
    SynonymCALPAIN INHIBITOR

 Structural Features

(-) Chains, Units

  123
Asymmetric/Biological Unit ABC

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 10)

Asymmetric/Biological Unit (1, 10)
No.NameCountTypeFull Name
1CA10Ligand/IonCALCIUM ION

(-) Sites  (10, 10)

Asymmetric Unit (10, 10)
No.NameEvidenceResiduesDescription
01AC1SOFTWAREILE A:89 , GLY A:91 , ASP A:96 , GLU A:175 , HOH A:742 , HOH A:753BINDING SITE FOR RESIDUE CA A 715
02AC2SOFTWAREGLU A:292 , ASP A:299 , GLN A:319 , ASP A:321 , GLU A:323 , HOH A:835BINDING SITE FOR RESIDUE CA A 716
03AC3SOFTWAREALA A:542 , ASP A:545 , GLU A:547 , GLU A:552 , HOH A:741BINDING SITE FOR RESIDUE CA A 717
04AC4SOFTWAREASP A:585 , ASP A:587 , SER A:589 , LYS A:591 , GLU A:596BINDING SITE FOR RESIDUE CA A 718
05AC5SOFTWAREASP A:615 , ASP A:617 , SER A:619 , THR A:621 , GLU A:626BINDING SITE FOR RESIDUE CA A 719
06AC6SOFTWAREASP A:658 , ASN A:661BINDING SITE FOR RESIDUE CA A 720
07AC7SOFTWAREHOH B:1 , ALA B:111 , ASP B:114 , GLU B:116 , GLU B:121 , HOH B:408BINDING SITE FOR RESIDUE CA B 401
08AC8SOFTWAREASP B:154 , ASP B:156 , THR B:158 , LYS B:160 , GLU B:165 , HOH B:417BINDING SITE FOR RESIDUE CA B 402
09AC9SOFTWAREASP B:184 , ASP B:186 , SER B:188 , THR B:190 , GLU B:195BINDING SITE FOR RESIDUE CA B 403
10BC1SOFTWAREASP B:139 , ASP B:227 , ASP B:229 , ASN B:230BINDING SITE FOR RESIDUE CA B 404

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 3BOW)

(-) Cis Peptide Bonds  (1, 1)

Asymmetric/Biological Unit
No.Residues
1Gln C:587 -Pro C:588

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 3BOW)

(-) PROSITE Motifs  (4, 12)

Asymmetric/Biological Unit (4, 12)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1CALPAIN_CATPS50203 Cysteine proteinase, calpain-type, catalytic domain profile.CAN2_RAT45-344  1A:45-344
2THIOL_PROTEASE_CYSPS00139 Eukaryotic thiol (cysteine) proteases cysteine active site.CAN2_RAT99-110  1A:99-110
3EF_HAND_1PS00018 EF-hand calcium-binding domain.CPNS1_RAT154-166
184-196
  2B:154-166
B:184-196
CAN2_RAT585-597
615-627
  2A:585-597
A:615-627
4EF_HAND_2PS50222 EF-hand calcium-binding domain profile.CPNS1_RAT171-206
141-169
236-270
  3B:171-206
B:141-169
B:236-270
CAN2_RAT602-637
572-597
667-700
  3A:602-637
A:572-597
A:667-700

(-) Exons   (21, 21)

Asymmetric/Biological Unit (21, 21)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1ENSRNOT000000453261ENSRNOE00000309023chr13:98524463-98523801663CAN2_RAT1-79791A:23-7957
1.2ENSRNOT000000453262ENSRNOE00000302168chr13:98519114-9851904570CAN2_RAT80-103241A:80-10324
1.3ENSRNOT000000453263ENSRNOE00000304443chr13:98499555-98499437119CAN2_RAT103-142401A:103-14240
1.4ENSRNOT000000453264ENSRNOE00000339353chr13:98498897-98498764134CAN2_RAT143-187451A:143-18745
1.5ENSRNOT000000453265ENSRNOE00000333421chr13:98497787-98497619169CAN2_RAT187-243571A:187-24357
1.6ENSRNOT000000453266ENSRNOE00000031098chr13:98496708-9849662584CAN2_RAT244-271281A:244-27128
1.7ENSRNOT000000453267ENSRNOE00000279872chr13:98495644-9849555986CAN2_RAT272-300291A:272-30029
1.8ENSRNOT000000453268ENSRNOE00000320842chr13:98494333-9849425975CAN2_RAT300-325261A:300-32526
1.9ENSRNOT000000453269ENSRNOE00000314027chr13:98493169-98493009161CAN2_RAT325-379551A:325-37955
1.10ENSRNOT0000004532610ENSRNOE00000314940chr13:98491026-98490857170CAN2_RAT379-435571A:379-43557
1.11ENSRNOT0000004532611ENSRNOE00000427163chr13:98489237-9848922612CAN2_RAT436-43941A:436-4394
1.12ENSRNOT0000004532612ENSRNOE00000362195chr13:98488354-98488143212CAN2_RAT440-510711A:440-50970
1.13ENSRNOT0000004532613ENSRNOE00000299140chr13:98486485-9848644937CAN2_RAT510-522131A:512-52211
1.14ENSRNOT0000004532614ENSRNOE00000031182chr13:98485176-9848511166CAN2_RAT523-544221A:523-54422
1.15ENSRNOT0000004532615ENSRNOE00000349861chr13:98483613-9848355658CAN2_RAT545-564201A:545-56420
1.16ENSRNOT0000004532616ENSRNOE00000321932chr13:98480438-9848037465CAN2_RAT564-585221A:564-58522
1.17ENSRNOT0000004532617ENSRNOE00000031210chr13:98479391-9847932369CAN2_RAT586-608231A:586-60823
1.18ENSRNOT0000004532618ENSRNOE00000341239chr13:98478952-9847887479CAN2_RAT609-635271A:609-63527
1.19ENSRNOT0000004532619ENSRNOE00000343555chr13:98476968-98476852117CAN2_RAT635-674401A:635-67440
1.20ENSRNOT0000004532620ENSRNOE00000365776chr13:98476397-9847633959CAN2_RAT674-693201A:674-69320
1.21ENSRNOT0000004532621ENSRNOE00000423005chr13:98474374-984733681007CAN2_RAT694-70071A:694-7007

(-) Sequences/Alignments

Asymmetric/Biological Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
(details for a mapped element are shown in a popup box when the mouse pointer rests over it)
Chain A from PDB  Type:PROTEIN  Length:680
 aligned with CAN2_RAT | Q07009 from UniProtKB/Swiss-Prot  Length:700

    Alignment length:682
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               700    
                                    32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372       382       392       402       412       422       432       442       452       462       472       482       492       502       512       522       532       542       552       562       572       582       592       602       612       622       632       642       652       662       672       682       692       | -  
             CAN2_RAT    23 RAIKYLNQDYETLRNECLEAGALFQDPSFPALPSSLGFKELGPYSSKTRGIEWKRPTEICADPQFIIGGATRTDICQGALGDCWLLAAIASLTLNEEILARVVPLDQSFQENYAGIFHFQFWQYGEWVEVVVDDRLPTKDGELLFVHSAEGSEFWSALLEKAYAKINGCYEALSGGATTEGFEDFTGGIAEWYELRKPPPNLFKIIQKALEKGSLLGCSIDITSAADSEAVTYQKLVKGHAYSVTGAEEVESSGSLQKLIRIRNPWGQVEWTGKWNDNCPSWNTVDPEVRANLTERQEDGEFWMSFSDFLRHYSRLEICNLTPDTLTCDSYKKWKLTKMDGNWRRGSTAGGCRNYPNTFWMNPQYLIKLEEEDEDDEDGERGCTFLVGLIQKHRRRQRKMGEDMHTIGFGIYEVPEELTGQTNIHLSKNFFLTTRARERSDTFINLREVLNRFKLPPGEYVLVPSTFEPHKNGDFCIRVFSEKKADYQTVDDEIEANIEEIEANEEDIGDGFRRLFAQLAGEDAEISAFELQTILRRVLAKREDIKSDGFSIETCKIMVDMLDEDGSGKLGLKEFYILWTKIQKYQKIYREIDVDRSGTMNSYEMRKALEEAGFKLPCQLHQVIVARFADDELIIDFDNFVRCLVRLEILFKIFKQLDPENTGTIQLDLISWLSFSVL----   -
               SCOP domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..ee.hhhhhhhhhhhhhhh...........hhhhh........hhhhh..eeehhhhhh..........hhhhh......hhhhhhhhhhhh.hhhhhhhhh............eeeeeeee..eeeeeeee..eeee..ee..........hhhhhhhhhhhhhh..hhhhh..hhhhhhhhhhh.eeeeee......hhhhhhhhhhhh..eeeee......................eeeeeeeeeee..eeeeeeeee...............hhhhhhhhhhhhhhhh......eeeeehhhhhhhh.eeeeee............eeeeeeeeeee...........hhhhhh....eeeeehhhhh.hhhhh..eeeeeeeeee.hhhhhhhh.....eeeeeee.hhhhh.......hhhhhhhh...ee...ee...eeeeeeee..eeeeeeeee......eeeeeeeeeee....--.....ee.......hhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhh..........hhhhhhhhhhhhh.......hhhhhhhhhhhhhhhhhhhhhhh......eehhhhhhhhhhh.ee.hhhhhhhhhhhhh....eehhhhhhhhhhhhhhhhhhhh........eeeeehhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ----------------------CALPAIN_CAT  PDB: A:45-344 UniProt: 45-344                                                                                                                                                                                                                                                                  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------EF_HAND_1    -----------------EF_HAND_1    ---------------------------------------EF_HAND_2  PDB: A:667-700         ---- PROSITE (1)
                PROSITE (2) ----------------------------------------------------------------------------THIOL_PROTEA-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------EF_HAND_2  PDB: A:572-597 ----EF_HAND_2  PDB: A:602-637           ------------------------------------------------------------------- PROSITE (2)
           Transcript 1 (1) Exon 1.1  PDB: A:23-79 UniProt: 1-79 [INCOMPLETE]        Exon 1.2  PDB: A:80-103 ---------------------------------------Exon 1.4  PDB: A:143-187 UniProt: 143-187    --------------------------------------------------------Exon 1.6  PDB: A:244-271    Exon 1.7  PDB: A:272-300     ------------------------------------------------------------------------------Exon 1.10  PDB: A:379-435 UniProt: 379-435               1.11Exon 1.12  PDB: A:440-509 UniProt: 440-510 [INCOMPLETE]                ------------Exon 1.14             Exon 1.15           ---------------------Exon 1.17              Exon 1.18  PDB: A:609-635  --------------------------------------Exon 1.20           1.21   ---- Transcript 1 (1)
           Transcript 1 (2) --------------------------------------------------------------------------------Exon 1.3  PDB: A:103-142                --------------------------------------------Exon 1.5  PDB: A:187-243 UniProt: 187-243                --------------------------------------------------------Exon 1.8  PDB: A:300-325  ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Exon 1.13    -----------------------------------------Exon 1.16             -------------------------------------------------Exon 1.19  PDB: A:635-674               ------------------------------ Transcript 1 (2)
           Transcript 1 (3) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Exon 1.9  PDB: A:325-379 UniProt: 325-379              ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript 1 (3)
                 3bow A  23 RAIKYLNQDYETLRNECLEAGALFQDPSFPALPSSLGFKELGPYSSKTRGIEWKRPTEICADPQFIIGGATRTDICQGALGDSWLLAAIASLTLNEEILARVVPLDQSFQENYAGIFHFQFWQYGEWVEVVVDDRLPTKDGELLFVHSAEGSEFWSALLEKAYAKINGCYEALSGGATTEGFEDFTGGIAEWYELRKPPPNLFKIIQKALEKGSLLGCSIDITSAADSEAVTYQKLVKGHAYSVTGAEEVESSGSLQKLIRIRNPWGQVEWTGKWNDNCPSWNTVDPEVRANLTERQEDGEFWMSFSDFLRHYSRLEICNLTPDTLTCDSYKKWKLTKMDGNWRRGSTAGGCRNYPNTFWMNPQYLIKLEEEDEDDEDGERGCTFLVGLIQKHRRRQRKMGEDMHTIGFGIYEVPEELTGQTNIHLSKNFFLTTRARERSDTFINLREVLNRFKLPPGEYVLVPSTFEPHKNGDFCIRVFSEKKADY--VDDEIEANIEEIEANEEDIGDGFRRLFAQLAGEDAEISAFELQTILRRVLAKREDIKSDGFSIETCKIMVDMLDEDGSGKLGLKEFYILWTKIQKYQKIYREIDVDRSGTMNSYEMRKALEEAGFKLPCQLHQVIVARFADDELIIDFDNFVRCLVRLEILFKIFKQLDPENTGTIQLDLISWLSFSVLGKLA 704
                                    32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372       382       392       402       412       422       432       442       452       462       472       482       492       502      |512       522       532       542       552       562       572       582       592       602       612       622       632       642       652       662       672       682       692       702  
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                509  |                                                                                                                                                                                                
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   512                                                                                                                                                                                                

Chain B from PDB  Type:PROTEIN  Length:174
 aligned with CPNS1_RAT | Q64537 from UniProtKB/Swiss-Prot  Length:270

    Alignment length:174
                                   106       116       126       136       146       156       166       176       186       196       206       216       226       236       246       256       266    
            CPNS1_RAT    97 SEEERQFRKLFVQLAGDDMEVSATELMNILNKVVTRHPDLKTDGFGIDTCRSMVAVMDSDTTGKLGFEEFKYLWNNIKKWQGIYKRFDTDRSGTIGSNELPGAFEAAGFHLNQHIYSMIIRRYSDETGNMDFDNFISCLVRLDAMFRAFRSLDKNGTGQIQVNIQEWLQLTMYS 270
               SCOP domains d3bowb_ B: Calpain small (regulatory) subunit (domain VI)                                                                                                                      SCOP domains
               CATH domains 3bowB00 B:97-270 EF-hand                                                                                                                                                       CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Pfam domains
         Sec.struct. author .hhhhhhhhhhhhhhh.....hhhhhhhhhhhhhh..........hhhhhhhhhhhhh.......hhhhhhhhhhhhhhhhhhhhhh...........hhhhhhhhh....hhhhhhhhhhhhh......hhhhhhhhhhhhhhhhhhhhhhh.....eeeeehhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                PROSITE (2) ---------------------------------------------------------EF_HAND_1    -----------------EF_HAND_1    ---------------------------------------EF_HAND_2  PDB: B:236-270           PROSITE (2)
                PROSITE (3) --------------------------------------------EF_HAND_2  PDB: B:141-169    -EF_HAND_2  PDB: B:171-206           ---------------------------------------------------------------- PROSITE (3)
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 3bow B  97 SEEERQFRKLFVQLAGDDMEVSATELMNILNKVVTRHPDLKTDGFGIDTCRSMVAVMDSDTTGKLGFEEFKYLWNNIKKWQGIYKRFDTDRSGTIGSNELPGAFEAAGFHLNQHIYSMIIRRYSDETGNMDFDNFISCLVRLDAMFRAFRSLDKNGTGQIQVNIQEWLQLTMYS 270
                                   106       116       126       136       146       156       166       176       186       196       206       216       226       236       246       256       266    

Chain C from PDB  Type:PROTEIN  Length:65
 aligned with ICAL_RAT | P27321 from UniProtKB/Swiss-Prot  Length:713

    Alignment length:91
                                   580       590       600       610       620       630       640       650       660 
             ICAL_RAT   571 ELDDALDELSDSLGQRQPDPDENKPLDDKVKEKIKAEHSEKLGERDDTIPPEYRHLLDNDGKDKPEKPLTKNTEKLGQDQDPIDALSEDLD 661
               SCOP domains ------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhhhhhhhh......------...........ee.......hhhhhhhhhhhhhh.--------------------.hhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------- Transcript
                 3bow C 571 ELDDALDELSDSLGQRQP------PLDDKVKEKIKAEHSEKLGERDDTIPPEYRHLLDN--------------------QDPIDALSEDLD 661
                                   580       | -    |  600       610       620        |-         -       650       660 
                                           588    595                               629                  650           

   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
    → Modified Residue (blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (1, 1)

Asymmetric/Biological Unit

(-) CATH Domains  (1, 1)

Asymmetric/Biological Unit

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 3BOW)

(-) Gene Ontology  (48, 62)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (CAN2_RAT | Q07009)
molecular function
    GO:0005509    calcium ion binding    Interacting selectively and non-covalently with calcium ions (Ca2+).
    GO:0004198    calcium-dependent cysteine-type endopeptidase activity    Catalysis of the hydrolysis of nonterminal peptide bonds in a polypeptide chain by a mechanism using a cysteine residue at the enzyme active center, and requiring the presence of calcium.
    GO:0008234    cysteine-type peptidase activity    Catalysis of the hydrolysis of peptide bonds in a polypeptide chain by a mechanism in which the sulfhydryl group of a cysteine residue at the active center acts as a nucleophile.
    GO:0008092    cytoskeletal protein binding    Interacting selectively and non-covalently with any protein component of any cytoskeleton (actin, microtubule, or intermediate filament cytoskeleton).
    GO:0016787    hydrolase activity    Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0008233    peptidase activity    Catalysis of the hydrolysis of a peptide bond. A peptide bond is a covalent bond formed when the carbon atom from the carboxyl group of one amino acid shares electrons with the nitrogen atom from the amino group of a second amino acid.
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
    GO:0046982    protein heterodimerization activity    Interacting selectively and non-covalently with a nonidentical protein to form a heterodimer.
biological process
    GO:0001824    blastocyst development    The process whose specific outcome is the progression of the blastocyst over time, from its formation to the mature structure. The mammalian blastocyst is a hollow ball of cells containing two cell types, the inner cell mass and the trophectoderm.
    GO:0071230    cellular response to amino acid stimulus    Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an amino acid stimulus. An amino acid is a carboxylic acids containing one or more amino groups.
    GO:0007520    myoblast fusion    A process in which non-proliferating myoblasts fuse to existing fibers or to myotubes to form new fibers. A myoblast is a mononucleate cell type that, by fusion with other myoblasts, gives rise to the myotubes that eventually develop into skeletal muscle fibers.
    GO:0016540    protein autoprocessing    Processing which a protein carries out itself. This involves actions such as the autolytic removal of residues to generate the mature form of the protein.
    GO:0006508    proteolysis    The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
    GO:0051603    proteolysis involved in cellular protein catabolic process    The hydrolysis of a peptide bond or bonds within a protein as part of the chemical reactions and pathways resulting in the breakdown of a protein by individual cells.
    GO:0051493    regulation of cytoskeleton organization    Any process that modulates the frequency, rate or extent of the formation, arrangement of constituent parts, or disassembly of cytoskeletal structures.
    GO:0001666    response to hypoxia    Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus indicating lowered oxygen tension. Hypoxia, defined as a decline in O2 levels below normoxic levels of 20.8 - 20.95%, results in metabolic adaptation at both the cellular and organismal level.
cellular component
    GO:0005794    Golgi apparatus    A compound membranous cytoplasmic organelle of eukaryotic cells, consisting of flattened, ribosome-free vesicles arranged in a more or less regular stack. The Golgi apparatus differs from the endoplasmic reticulum in often having slightly thicker membranes, appearing in sections as a characteristic shallow semicircle so that the convex side (cis or entry face) abuts the endoplasmic reticulum, secretory vesicles emerging from the concave side (trans or exit face). In vertebrate cells there is usually one such organelle, while in invertebrates and plants, where they are known usually as dictyosomes, there may be several scattered in the cytoplasm. The Golgi apparatus processes proteins produced on the ribosomes of the rough endoplasmic reticulum; such processing includes modification of the core oligosaccharides of glycoproteins, and the sorting and packaging of proteins for transport to a variety of cellular locations. Three different regions of the Golgi are now recognized both in terms of structure and function: cis, in the vicinity of the cis face, trans, in the vicinity of the trans face, and medial, lying between the cis and trans regions.
    GO:0000785    chromatin    The ordered and organized complex of DNA, protein, and sometimes RNA, that forms the chromosome.
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0005829    cytosol    The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
    GO:0030425    dendrite    A neuron projection that has a short, tapering, often branched, morphology, receives and integrates signals from other neurons or from sensory stimuli, and conducts a nerve impulse towards the axon or the cell body. In most neurons, the impulse is conveyed from dendrites to axon via the cell body, but in some types of unipolar neuron, the impulse does not travel via the cell body.
    GO:0005783    endoplasmic reticulum    The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached).
    GO:0070062    extracellular exosome    A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
    GO:0005925    focal adhesion    Small region on the surface of a cell that anchors the cell to the extracellular matrix and that forms a point of termination of actin filaments.
    GO:0005622    intracellular    The living contents of a cell; the matter contained within (but not including) the plasma membrane, usually taken to exclude large vacuoles and masses of secretory or ingested material. In eukaryotes it includes the nucleus and cytoplasm.
    GO:0005764    lysosome    A small lytic vacuole that has cell cycle-independent morphology and is found in most animal cells and that contains a variety of hydrolases, most of which have their maximal activities in the pH range 5-6. The contained enzymes display latency if properly isolated. About 40 different lysosomal hydrolases are known and lysosomes have a great variety of morphologies and functions.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0045121    membrane raft    Any of the small (10-200 nm), heterogeneous, highly dynamic, sterol- and sphingolipid-enriched membrane domains that compartmentalize cellular processes. Small rafts can sometimes be stabilized to form larger platforms through protein-protein and protein-lipid interactions.
    GO:0005634    nucleus    A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
    GO:0097038    perinuclear endoplasmic reticulum    The portion of endoplasmic reticulum, the intracellular network of tubules and cisternae, that occurs near the nucleus. The lumen of the perinuclear endoplasmic reticulum is contiguous with the nuclear envelope lumen (also called perinuclear space), the region between the inner and outer nuclear membranes.
    GO:0005886    plasma membrane    The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
    GO:0031143    pseudopodium    A temporary protrusion or retractile process of a cell, associated with flowing movements of the protoplasm, and serving for locomotion and feeding.

Chain B   (CPNS1_RAT | Q64537)
molecular function
    GO:0005509    calcium ion binding    Interacting selectively and non-covalently with calcium ions (Ca2+).
    GO:0004198    calcium-dependent cysteine-type endopeptidase activity    Catalysis of the hydrolysis of nonterminal peptide bonds in a polypeptide chain by a mechanism using a cysteine residue at the enzyme active center, and requiring the presence of calcium.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
    GO:0046982    protein heterodimerization activity    Interacting selectively and non-covalently with a nonidentical protein to form a heterodimer.
biological process
    GO:0006508    proteolysis    The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
cellular component
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005886    plasma membrane    The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

Chain C   (ICAL_RAT | P27321)
molecular function
    GO:0010859    calcium-dependent cysteine-type endopeptidase inhibitor activity    Stops, prevents or reduces the activity of a calcium-dependent cysteine-type endopeptidase, any enzyme that hydrolyzes peptide bonds in polypeptides by a mechanism in which the sulfhydryl group of a cysteine residue at the active center acts as a nucleophile in a calcium-dependent manner.
    GO:0004869    cysteine-type endopeptidase inhibitor activity    Stops, prevents or reduces the activity of a cysteine-type endopeptidase, any enzyme that hydrolyzes peptide bonds in polypeptides by a mechanism in which the sulfhydryl group of a cysteine residue at the active center acts as a nucleophile.
    GO:0030414    peptidase inhibitor activity    Stops, prevents or reduces the activity of a peptidase, any enzyme that catalyzes the hydrolysis peptide bonds.
    GO:0002020    protease binding    Interacting selectively and non-covalently with any protease or peptidase.
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
biological process
    GO:0007568    aging    A developmental process that is a deterioration and loss of function over time. Aging includes loss of functions such as resistance to disease, homeostasis, and fertility, as well as wear and tear. Aging includes cellular senescence, but is more inclusive. May precede death and may succeed developmental maturation (GO:0021700).
    GO:0031100    animal organ regeneration    The regrowth of a lost or destroyed animal organ.
    GO:0007420    brain development    The process whose specific outcome is the progression of the brain over time, from its formation to the mature structure. Brain development begins with patterning events in the neural tube and ends with the mature structure that is the center of thought and emotion. The brain is responsible for the coordination and control of bodily activities and the interpretation of information from the senses (sight, hearing, smell, etc.).
    GO:0007343    egg activation    The process in which the egg becomes metabolically active, initiates protein and DNA synthesis and undergoes structural changes to its cortex and/or cytoplasm.
    GO:0001889    liver development    The process whose specific outcome is the progression of the liver over time, from its formation to the mature structure. The liver is an exocrine gland which secretes bile and functions in metabolism of protein and carbohydrate and fat, synthesizes substances involved in the clotting of the blood, synthesizes vitamin A, detoxifies poisonous substances, stores glycogen, and breaks down worn-out erythrocytes.
    GO:0045445    myoblast differentiation    The process in which a relatively unspecialized cell acquires specialized features of a myoblast. A myoblast is a mononucleate cell type that, by fusion with other myoblasts, gives rise to the myotubes that eventually develop into striated muscle fibers.
    GO:0007520    myoblast fusion    A process in which non-proliferating myoblasts fuse to existing fibers or to myotubes to form new fibers. A myoblast is a mononucleate cell type that, by fusion with other myoblasts, gives rise to the myotubes that eventually develop into skeletal muscle fibers.
    GO:0043086    negative regulation of catalytic activity    Any process that stops or reduces the activity of an enzyme.
    GO:0071157    negative regulation of cell cycle arrest    Any process that decreases the rate, frequency, or extent of cell cycle arrest, the process in which the cell cycle is halted during one of the normal phases.
    GO:0010951    negative regulation of endopeptidase activity    Any process that decreases the frequency, rate or extent of endopeptidase activity, the endohydrolysis of peptide bonds within proteins.
    GO:0010466    negative regulation of peptidase activity    Any process that stops or reduces the rate of peptidase activity, the hydrolysis of peptide bonds within proteins.
    GO:0042176    regulation of protein catabolic process    Any process that modulates the frequency, rate or extent of the chemical reactions and pathways resulting in the breakdown of a protein by the destruction of the native, active configuration, with or without the hydrolysis of peptide bonds.
cellular component
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005634    nucleus    A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        CAN2_RAT | Q070091df0 1mdw 1qxp 1u5i 3df0
        CPNS1_RAT | Q645371aj5 1df0 1dvi 1np8 1u5i 3df0
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(-) Related Entries Specified in the PDB File

1df0 CRYSTAL STRUCTURE OF M-CALPAIN
1kfu CRYSTAL STRUCTURE OF CALCIUM-FREE HUMAN CALPAIN II
1kxr CRYSTAL STRUCTURE OF CALCIUM-BOUND PROTEASE CORE OF CALPAIN I