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(-) Description

Title :  CRYSTAL STRUCTURE OF M-CALPAIN
 
Authors :  C. M. Hosfield, J. S. Elce, P. L. Davies, Z. Jia
Date :  16 Nov 99  (Deposition) - 21 Jun 00  (Release) - 09 May 12  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.60
Chains :  Asym./Biol. Unit :  A,B
Keywords :  Cysteine Protease, Calmodulin, Papain, Catalytic Triad, Zymogen Activation, C2 Domain, Protease, Zymogen, Calpain, Hydrolase (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  C. M. Hosfield, J. S. Elce, P. L. Davies, Z. Jia
Crystal Structure Of Calpain Reveals The Structural Basis For Ca(2+)-Dependent Protease Activity And A Novel Mode Of Enzyme Activation.
Embo J. V. 18 6880 1999
PubMed-ID: 10601010  |  Reference-DOI: 10.1093/EMBOJ/18.24.6880
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - M-CALPAIN
    ChainsA
    EC Number3.4.22.53
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System Taxid562
    FragmentLARGE (CATALYTIC) SUBUNIT
    MutationYES
    Organism CommonNORWAY RAT
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116
    SynonymCALCIUM-ACTIVATED NEUTRAL PROTEINASE, CALPAIN 2
 
Molecule 2 - CALPAIN
    ChainsB
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System Taxid562
    FragmentDOMAIN VI (CALCIUM-BINDING DOMAIN), SMALL (REGULATORY) SUBUNIT
    Organism CommonNORWAY RAT
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116
    SynonymCALCIUM-ACTIVATED NEUTRAL PROTEINASE

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit AB

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (0, 0)

(no "Ligand,Modified Residues,Ions" information available for 1DF0)

(-) Sites  (0, 0)

(no "Site" information available for 1DF0)

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 1DF0)

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1DF0)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1DF0)

(-) 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:68-80
B:98-110
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:85-120
B:55-83
B:150-184
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:2-7978
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:244-271 (gaps)28
1.7ENSRNOT000000453267ENSRNOE00000279872chr13:98495644-9849555986CAN2_RAT272-300291A:272-290 (gaps)19
1.8ENSRNOT000000453268ENSRNOE00000320842chr13:98494333-9849425975CAN2_RAT300-325261A:322-3254
1.9ENSRNOT000000453269ENSRNOE00000314027chr13:98493169-98493009161CAN2_RAT325-379551A:325-37955
1.10ENSRNOT0000004532610ENSRNOE00000314940chr13:98491026-98490857170CAN2_RAT379-435571A:379-435 (gaps)57
1.11ENSRNOT0000004532611ENSRNOE00000427163chr13:98489237-9848922612CAN2_RAT436-43941A:436-4361
1.12ENSRNOT0000004532612ENSRNOE00000362195chr13:98488354-98488143212CAN2_RAT440-510711A:449-510 (gaps)62
1.13ENSRNOT0000004532613ENSRNOE00000299140chr13:98486485-9848644937CAN2_RAT510-522131A:510-52213
1.14ENSRNOT0000004532614ENSRNOE00000031182chr13:98485176-9848511166CAN2_RAT523-544221A:523-544 (gaps)22
1.15ENSRNOT0000004532615ENSRNOE00000349861chr13:98483613-9848355658CAN2_RAT545-564201A:545-56319
1.16ENSRNOT0000004532616ENSRNOE00000321932chr13:98480438-9848037465CAN2_RAT564-585221A:568-58518
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:624
 aligned with CAN2_RAT | Q07009 from UniProtKB/Swiss-Prot  Length:700

    Alignment length:699
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341       351       361       371       381       391       401       411       421       431       441       451       461       471       481       491       501       511       521       531       541       551       561       571       581       591       601       611       621       631       641       651       661       671       681       691         
             CAN2_RAT     2 AGIAMKLAKDREAAEGLGSHERAIKYLNQDYETLRNECLEAGALFQDPSFPALPSSLGFKELGPYSSKTRGIEWKRPTEICADPQFIIGGATRTDICQGALGDCWLLAAIASLTLNEEILARVVPLDQSFQENYAGIFHFQFWQYGEWVEVVVDDRLPTKDGELLFVHSAEGSEFWSALLEKAYAKINGCYEALSGGATTEGFEDFTGGIAEWYELRKPPPNLFKIIQKALEKGSLLGCSIDITSAADSEAVTYQKLVKGHAYSVTGAEEVESSGSLQKLIRIRNPWGQVEWTGKWNDNCPSWNTVDPEVRANLTERQEDGEFWMSFSDFLRHYSRLEICNLTPDTLTCDSYKKWKLTKMDGNWRRGSTAGGCRNYPNTFWMNPQYLIKLEEEDEDDEDGERGCTFLVGLIQKHRRRQRKMGEDMHTIGFGIYEVPEELTGQTNIHLSKNFFLTTRARERSDTFINLREVLNRFKLPPGEYVLVPSTFEPHKNGDFCIRVFSEKKADYQTVDDEIEANIEEIEANEEDIGDGFRRLFAQLAGEDAEISAFELQTILRRVLAKREDIKSDGFSIETCKIMVDMLDEDGSGKLGLKEFYILWTKIQKYQKIYREIDVDRSGTMNSYEMRKALEEAGFKLPCQLHQVIVARFADDELIIDFDNFVRCLVRLEILFKIFKQLDPENTGTIQLDLISWLSFSVL 700
               SCOP domains d1df0a3 A:2-355 Calpain large subunit, catalytic domain (domain II)                                                                                                                                                                                                                                                                                               d1df0a2 A:356-514 Calpain large subunit, middl e domain (domain III)                                                                                           d1df0a1 A :515-700 Calpain large subunit, C-termi    nal domain (domain IV)                                                                                                                SCOP domains
               CATH domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------1df0A02 A:210-354 Cysteine proteina                ses                                                                                           1df0A03 A:355-505  [code=2.60.120.380, no name  defined]                                                                                               ------------------ -----1df0A04 A:530-700 EF-hand                                                                                                                                                   CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhhhhhhhhhh....hhhhhee.hhhhhhhhhhhhhhh...........hhhhh...............eeehhhhh...............ee......hhhhhhhhhhhhhhhhhhh..............eeeeeeee..eeeeeeee..eee........ee.....hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.eeeeee......hhhhhhhhhhhh..eeeee...----------------...eeeeeeee.------.eeeeee.....-------------------------------.eeeeehhhhhhhh.eeeeee..............eeeeeeeee...........hhhhhh....eeeee..........-..eeeeeeeee...............eeeeeee.------------.......----..........eeeeeeee..eeeeeeeee......eeeeeeeee...eeeee.....ee.....-......hhhhhhhhhhhhhhhh.eehhhhhhhhhhhhhh----.....hhhhhhhhhhhhh.....eehhhhhhhhhhhhhhhhhhhhhhh......ee..hhhhhhhhh.ee.hhhhhhhhhhhhh....eehhhhhhhhhhhhhhhhhhhhhhh.....eeeeehhhhhhhhh. 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:2-79 UniProt: 1-79 [INCOMPLETE]                              Exon 1.2  PDB: A:80-103 ---------------------------------------Exon 1.4  PDB: A:143-187 UniProt: 143-187    --------------------------------------------------------Exon 1.6 UniProt: 244-271   Exon 1.7 UniProt: 272-300    ------------------------------------------------------------------------------Exon 1.10  PDB: A:379-435 (gaps) UniProt: 379-435        1.11Exon 1.12  PDB: A:449-510 (gaps) 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:322-325  ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Exon 1.13    -----------------------------------------Exon 1.16 [INCOMPLETE]-------------------------------------------------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)
                 1df0 A   2 AGIAMKLAKDREAAEGLGSHERAIKYLNQDYETLRNECLEAGALFQDPSFPALPSSLGFKELGPYSSKTRGIEWKRPTEICADPQFIIGGATRTDICQGALGDSWLLAAIASLTLNEEILARVVPLDQSFQENYAGIFHFQFWQYGEWVEVVVDDRLPTKDGELLFVHSAEGSEFWSALLEKAYAKINGCYEALSGGATTEGFEDFTGGIAEWYELRKPPPNLFKIIQKALEKGSLLGCSIDI----------------GHAYSVTGAEEV------QKLIRIRNPWGQ-------------------------------GEFWMSFSDFLRHYSRLEICNLTPDTLTCDSYKKWKLTKMDGNWRRGSTAGGCRNYPNTFWMNPQYLIKLEEEDEDDEDG-RGCTFLVGLIQKHRRRQRKMGEDMHTIGFGIYEV------------SKNFFLT----ERSDTFINLREVLNRFKLPPGEYVLVPSTFEPHKNGDFCIRVFSEKKADYQTVDDEIEANIEEI-ANEEDIGDGFRRLFAQLAGEDAEISAFELQTILRRVLAK----KSDGFSIETCKIMVDMLDEDGSGKLGLKEFYILWTKIQKYQKIYREIDVDRSGTMNSYEMRKALEEAGFKLPCQLHQVIVARFADDELIIDFDNFVRCLVRLEILFKIFKQLDPENTGTIQLDLISWLSFSVL 700
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241  |      -       261       271|      281        |-         -         -         -|      331       341       351       361       371       381       391       401 |     411       421       431    |    -       451   |   461       471       481       491       501       511       521 | |   531       541       551       561 |    |571       581       591       601       611       621       631       641       651       661       671       681       691         
                                                                                                                                                                                                                                                                            244              261        272    279        290                             322                                                                            401 |                              436          449   455  460                                                            523 |                                   563  568                                                                                                                                    
                                                                                                                                                                                                                                                                                                                                                                                                                                           403                                                                                                                       525                                                                                                                                                                               

Chain B from PDB  Type:PROTEIN  Length:176
 aligned with CPNS1_RAT | Q64537 from UniProtKB/Swiss-Prot  Length:270

    Alignment length:176
                                   104       114       124       134       144       154       164       174       184       194       204       214       224       234       244       254       264      
            CPNS1_RAT    95 NESEEERQFRKLFVQLAGDDMEVSATELMNILNKVVTRHPDLKTDGFGIDTCRSMVAVMDSDTTGKLGFEEFKYLWNNIKKWQGIYKRFDTDRSGTIGSNELPGAFEAAGFHLNQHIYSMIIRRYSDETGNMDFDNFISCLVRLDAMFRAFRSLDKNGTGQIQVNIQEWLQLTMYS 270
               SCOP domains d1df0b_ B: Calpain small (regulatory) subunit (domain VI)                                                                                                                        SCOP domains
               CATH domains 1df0B00 B:9-184 EF-hand                                                                                                                                                          CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..hhhhhhhhhhhhhhhh...eehhhhhhhhhh..............hhhhhhhhhhhhh......eehhhhhhhhhhhhhhhhhhhhhh.....ee...hhhhhhhhh....hhhhhhhhhhhhh.....eehhhhhhhhhhhhhhhhhhhhh......eeeeehhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (2) -----------------------------------------------------------EF_HAND_1    -----------------EF_HAND_1    ---------------------------------------EF_HAND_2  PDB: B:150-184           PROSITE (2)
                PROSITE (3) ----------------------------------------------EF_HAND_2  PDB: B:55-83      -EF_HAND_2  PDB: B:85-120            ---------------------------------------------------------------- PROSITE (3)
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1df0 B   9 NESEEERQFRKLFVQLAGDDMEVSATELMNILNKVVTRHPDLKTDGFGIDTCRSMVAVMDSDTTGKLGFEEFKYLWNNIKKWQGIYKRFDTDRSGTIGSNELPGAFEAAGFHLNQHIYSMIIRRYSDETGNMDFDNFISCLVRLDAMFRAFRSLDKNGTGQIQVNIQEWLQLTMYS 184
                                    18        28        38        48        58        68        78        88        98       108       118       128       138       148       158       168       178      

   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  (4, 4)

Asymmetric/Biological Unit

(-) CATH Domains  (3, 4)

Asymmetric/Biological Unit
(-)
Class: Alpha Beta (26913)
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1DF0)

(-) Gene Ontology  (33, 42)

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.

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 Related Entries

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

UniProtKB/Swiss-Prot
        CAN2_RAT | Q070091mdw 1qxp 1u5i 3bow 3df0
        CPNS1_RAT | Q645371aj5 1dvi 1np8 1u5i 3bow 3df0

(-) Related Entries Specified in the PDB File

1aj5 HOMODIMERIC STRUCTURE OF THE REGULATORY SUBUNIT IN THE ABSENCE OF CA2+
1alv HOMODIMERIC STRUCTURE OF THE REGULATORY SUBUNIT WITH CA2+ BOUND
1alw HOMODIMERIC STRUCTURE OF THE REGULATORY SUBUNIT WITH BOUND CA2+ AND INHIBITOR
1dvi HOMODIMERIC STRUCTURE OF THE REGULATORY SUBUNIT WITH CA2+ BOUND