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Title :   CRYSTAL STRUCTURE OF CALCIUM-BOUND PROTEASE CORE OF CALPAIN I

Authors :   T. Moldoveanu, C. M. Hosfield, D. Lim, J. S. Elce, Z. Jia, P. L. Davies

Date :   01 Feb 02 (Deposition) - 20 Mar 02 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.07

Chains :   Asym. Unit : A,B
Biol. Unit 1: A  (1x)
Biol. Unit 2: B  (1x)

Keywords :   Papain-Related, Calcium-Dependent Cysteine Protease, Two Novel Cooperative Calcium Sites, Hydrolase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   T. Moldoveanu, C. M. Hosfield, D. Lim, J. S. Elce, Z. Jia, P. L. Davies
A Ca(2+) Switch Aligns The Active Site Of Calpain.
Cell(Cambridge, Mass. ) V. 108 649 2002
PubMed-ID: 11893336 | Reference-DOI: 10.1016/S0092-8674(02)00659-1
(for further references see the PDB file header)

Molecule 1 - THIOL PROTEASE DOMAINS I AND II
	Chains	:	A, B
	EC Number	:	3.4.22.17
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI BL21(DE3)
	Expression System Plasmid	:	PET24D
	Expression System Strain	:	BL21-DE3
	Expression System Taxid	:	469008
	Expression System Vector Type	:	PLASMID
	Fragment	:	RESIDUES 27-356
	Gene	:	CAPN1
	Mutation	:	YES
	Organism Common	:	NORWAY RAT
	Organism Scientific	:	RATTUS NORVEGICUS
	Organism Taxid	:	10116
	Synonym	:	CALPAIN I PROTEASE CORE

		1	2
Asymmetric Unit	:	A	B
Biological Unit 1 (1x)	:	A
Biological Unit 2 (1x)	:		B

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (1, 4)

No.	Name	Count	Type	Full Name
1	CA	4	Ligand/Ion	CALCIUM ION

Biological Unit 1 (0, 0)

No.	Name	Count	Type	Full Name
1	CA	-1	Ligand/Ion	CALCIUM ION

Biological Unit 2 (0, 0)

No.	Name	Count	Type	Full Name
1	CA	-1	Ligand/Ion	CALCIUM ION

Asymmetric Unit (4, 4)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	VAL A:99 , GLY A:101 , ASP A:106 , GLU A:185 , HOH A:450 , HOH A:451	BINDING SITE FOR RESIDUE CA A 1
2	AC2	SOFTWARE	GLU A:302 , ASP A:309 , MET A:329 , ASP A:331 , GLU A:333 , HOH A:380	BINDING SITE FOR RESIDUE CA A 2
3	AC3	SOFTWARE	VAL B:99 , GLY B:101 , ASP B:106 , GLU B:185 , HOH B:443 , HOH B:444	BINDING SITE FOR RESIDUE CA B 3
4	AC4	SOFTWARE	GLU B:302 , ASP B:309 , MET B:329 , ASP B:331 , GLU B:333 , HOH B:446	BINDING SITE FOR RESIDUE CA B 4

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

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

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

Asymmetric Unit (2, 4)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	CALPAIN_CAT	PS50203	Cysteine proteinase, calpain-type, catalytic domain profile.	CAN1_RAT	55-354	2	A:55-352 B:55-353
2	THIOL_PROTEASE_CYS	PS00139	Eukaryotic thiol (cysteine) proteases cysteine active site.	CAN1_RAT	109-120	2	A:109-120 B:109-120

Biological Unit 1 (2, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	CALPAIN_CAT	PS50203	Cysteine proteinase, calpain-type, catalytic domain profile.	CAN1_RAT	55-354	1	A:55-352 -
2	THIOL_PROTEASE_CYS	PS00139	Eukaryotic thiol (cysteine) proteases cysteine active site.	CAN1_RAT	109-120	1	A:109-120 -

Biological Unit 2 (2, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	CALPAIN_CAT	PS50203	Cysteine proteinase, calpain-type, catalytic domain profile.	CAN1_RAT	55-354	1	- B:55-353
2	THIOL_PROTEASE_CYS	PS00139	Eukaryotic thiol (cysteine) proteases cysteine active site.	CAN1_RAT	109-120	1	- B:109-120

(no "Exon" information available for 1KXR)

Asymmetric 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:320
 aligned with CAN1_RAT | P97571 from UniProtKB/Swiss-Prot  Length:713

    Alignment length:320
                                    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
             CAN1_RAT    33 NAIKYLGQDYENLRARCLQNGVLFQDDAFPPVSHSLGFKELGPNSSKTYGIKWKRPTELLSNPQFIVDGATRTDICQGALGDCWLLAAIASLTLNETILHRVVPYGQSFQEGYAGIFHFQLWQFGEWVDVVVDDLLPTKDGKLVFVHSAQGNEFWSALLEKAYAKVNGSYEALSGGCTSEAFEDFTGGVTEWYDLQKAPSDLYQIILKALERGSLLGCSINISDIRDLEAITFKNLVRGHAYSVTDAKQVTYQGQRVNLIRMRNPWGEVEWKGPWSDNSYEWNKVDPYEREQLRVKMEDGEFWMSFRDFIREFTKLEICN 352
               SCOP domains d1kxra_ A: Calpain large subunit, catalytic domain (domain II)                                                                                                                                                                                                                                                                   SCOP domains
               CATH domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..ee.hhhhhhhhhhhhhhh...........hhhhhh.......hhhhh..eeehhhhhh..........hhhhh......hhhhhhhhhhhh.hhhhhhhhh............eeeeeeee..eeeeeeee..eeee..ee..........hhhhhhhhhhhhhhh.hhhhh..hhhhhhhhhhh..eeeee.hhh..hhhhhhhhhhhh..eeeee..........ee.....ee...eeeeeeeeeee..eeeeeeeee...............hhhhhhhhhhhhhhhh......eeeeehhhhhhhh.eeeee. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ----------------------CALPAIN_CAT  PDB: A:55-352 UniProt: 55-354                                                                                                                                                                                                                                                                 PROSITE (1)
                PROSITE (2) ----------------------------------------------------------------------------THIOL_PROTEA---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE (2)
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1kxr A  33 NAIKYLGQDYENLRARCLQNGVLFQDDAFPPVSHSLGFKELGPNSSKTYGIKWKRPTELLSNPQFIVDGATRTDICQGALGDSWLLAAIASLTLNETILHRVVPYGQSFQEGYAGIFHFQLWQFGEWVDVVVDDLLPTKDGKLVFVHSAQGNEFWSALLEKAYAKVNGSYEALSGGCTSEAFEDFTGGVTEWYDLQKAPSDLYQIILKALERGSLLGCSINISDIRDLEAITFKNLVRGHAYSVTDAKQVTYQGQRVNLIRMRNPWGEVEWKGPWSDNSYEWNKVDPYEREQLRVKMEDGEFWMSFRDFIREFTKLEICN 352
                                    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

Chain B from PDB  Type:PROTEIN  Length:321
 aligned with CAN1_RAT | P97571 from UniProtKB/Swiss-Prot  Length:713

    Alignment length:321
                                    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 
             CAN1_RAT    33 NAIKYLGQDYENLRARCLQNGVLFQDDAFPPVSHSLGFKELGPNSSKTYGIKWKRPTELLSNPQFIVDGATRTDICQGALGDCWLLAAIASLTLNETILHRVVPYGQSFQEGYAGIFHFQLWQFGEWVDVVVDDLLPTKDGKLVFVHSAQGNEFWSALLEKAYAKVNGSYEALSGGCTSEAFEDFTGGVTEWYDLQKAPSDLYQIILKALERGSLLGCSINISDIRDLEAITFKNLVRGHAYSVTDAKQVTYQGQRVNLIRMRNPWGEVEWKGPWSDNSYEWNKVDPYEREQLRVKMEDGEFWMSFRDFIREFTKLEICNL 353
               SCOP domains d1kxrb_ B: Calpain large subunit, catalytic domain (domain II)                                                                                                                                                                                                                                                                    SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
           Pfam domains (1) ----------------------Peptidase_C2-1kxrB01 B:55-353                                                                                                                                                                                                                                                                               Pfam domains (1)
           Pfam domains (2) ----------------------Peptidase_C2-1kxrB02 B:55-353                                                                                                                                                                                                                                                                               Pfam domains (2)
         Sec.struct. author ..ee.hhhhhhhhhhhhhhh...........hhhhhh.......hhhhh..eeehhhhhh..........hhhhh......hhhhhhhhhhhh.hhhhhhhhh............eeeeeeee..eeeeeeee..eeee..ee..........hhhhhhhhhhhhhh..hhhhh..hhhhhhhhhhh.eeeeee.hhh..hhhhhhhhhhhhh.eeeee....hhhhh.............eeeeeeeeee....eeeeeeee...............hhhhhhhhhhhhhhhh......eeeeehhhhhhhh.eeeeee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ----------------------CALPAIN_CAT  PDB: B:55-353 UniProt: 55-354                                                                                                                                                                                                                                                                  PROSITE (1)
                PROSITE (2) ----------------------------------------------------------------------------THIOL_PROTEA----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE (2)
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1kxr B  33 NAIKYLGQDYENLRARCLQNGVLFQDDAFPPVSHSLGFKELGPNSSKTYGIKWKRPTELLSNPQFIVDGATRTDICQGALGDSWLLAAIASLTLNETILHRVVPYGQSFQEGYAGIFHFQLWQFGEWVDVVVDDLLPTKDGKLVFVHSAQGNEFWSALLEKAYAKVNGSYEALSGGCTSEAFEDFTGGVTEWYDLQKAPSDLYQIILKALERGSLLGCSINISDIRDLEAITFKNLVRGHAYSVTDAKQVTYQGQRVNLIRMRNPWGEVEWKGPWSDNSYEWNKVDPYEREQLRVKMEDGEFWMSFRDFIREFTKLEICNL 353
                                    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

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 '\|'

(no "CATH Domain" information available for 1KXR)

Asymmetric Unit

Clans(

)

Families(

)

Organisms( (-)

)

Clan: Peptidase_CA (169)

Family: Peptidase_C2 (15)

Rattus norvegicus (Rat) (10)

1a	Peptidase_C2-1kxrB01	B:55-353
1b	Peptidase_C2-1kxrB02	B:55-353

Asymmetric Unit(hide GO term definitions)

Chain A,B (CAN1_RAT | P97571)

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).
biological process
	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.
cellular component
	GO:0005737	cytoplasm	All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
	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: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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	1kxr
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	3.4.22.17
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	CAN1_RAT \| P97571	:	1qxp 1tl9 1tlo 2g8e 2g8j 2nqg 2nqi 2r9c 2r9f

1aj5	CRYSTAL STRUCTURE OF CALCIUM-FREE DOMAIN VI HOMODIMER
1alw	CRYSTAL STRUCTURE OF CALCIUM/INHIBITOR-BOUND DOMAIN VI HOMODIMER
1df0	CRYSTAL STRUCTURE OF RAT CALCIUM-FREE CALPAIN II HETERODIMER
1dvi	CRYSTAL STRUCTURE OF CALCIUM-BOUND DOMAIN VI HOMODIMER
1kfu	CRYSTAL STRUCTURE OF CALCIUM-FREE HUMAN CALPAIN II HETERODIMER - CRYSTAL FORM I
1kfx	CRYSTAL STRUCTURE OF CALCIUM-FREE HUMAN CALPAIN II HETERODIMER - CRYSTAL FORM II

Description

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Ligands, Modified Residues, Ions (1, 4)

Sites (4, 4)

SS Bonds (0, 0)

Cis Peptide Bonds (0, 0)

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SAPs(SNPs)/Variants (0, 0)

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Exons (0, 0)

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SCOP Domains (1, 2)

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Gene Ontology (14, 14)

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