3IMA | pdb_00003ima

Complex structure of tarocystatin and papain

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Protein Modification Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
C	d3imac_	Alpha and beta proteins (a+b)	Cysteine proteinases	Cysteine proteinases	Papain-like	Papain	(Carica papaya ) [TaxId: 3649 ],	SCOPe (2.08)
A	d3imaa_	Alpha and beta proteins (a+b)	Cysteine proteinases	Cysteine proteinases	Papain-like	Papain	(Carica papaya ) [TaxId: 3649 ],	SCOPe (2.08)
D	d3imad_	Alpha and beta proteins (a+b)	Cystatin-like	Cystatin/monellin	automated matches	automated matches	cocoyam,dasheen,eddo,elephant's ear,kalo,malanga (Colocasia esculenta ) [TaxId: 4460 ],	SCOPe (2.08)
B	d3imab_	Alpha and beta proteins (a+b)	Cystatin-like	Cystatin/monellin	automated matches	automated matches	cocoyam,dasheen,eddo,elephant's ear,kalo,malanga (Colocasia esculenta ) [TaxId: 4460 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C	SCOP2B Superfamily	Cysteine proteinases	8036216	3001808	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Cysteine proteinases	8036216	3001808	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Cystatin/monellin	8073972	3000441	SCOP2B (2022-06-29)
B	SCOP2 Family	Cystatins	8073971	4001013	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Cystatin/monellin	8073972	3000441	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C	RVP	e3imaC1	A: a/b three-layered sandwiches	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: RVP	ECOD (v294.1)
A	Pyr_redox	e3imaA1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: HTH	T: winged helix domain	F: Pyr_redox	ECOD (v294.1)
D	RVP	e3imaD1	A: a/b three-layered sandwiches	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: RVP	ECOD (v294.1)
B	SRF-TF	e3imaB1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: HTH	T: winged helix domain	F: SRF-TF	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C	3.90.70.10	Alpha Beta	Alpha-Beta Complex	Cathepsin B	Chain A	CATH (4.3.0)
A	3.90.70.10	Alpha Beta	Alpha-Beta Complex	Cathepsin B	Chain A	CATH (4.3.0)
D	3.10.450.10	Alpha Beta	Roll	Nuclear Transport Factor 2	Chain: A,	CATH (4.3.0)
B	3.10.450.10	Alpha Beta	Roll	Nuclear Transport Factor 2	Chain: A,	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C	Papain	protein binding binding serpin family protein binding cysteine-type peptidase activity peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity	proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process	-
B, D	Cysteine proteinase inhibitor	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity molecular function regulator activity enzyme inhibitor activity cysteine-type endopeptidase inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C	IPR038765	Papain-like cysteine peptidase superfamily	Homologous Superfamily
A, C	IPR025661	Cysteine peptidase, asparagine active site	Active Site
A, C	IPR000169	Cysteine peptidase, cysteine active site	Active Site
A, C	IPR025660	Cysteine peptidase, histidine active site	Active Site
A, C	IPR013128	Peptidase C1A	Family
A, C	IPR000668	Peptidase C1A, papain C-terminal	Domain
A, C	IPR013201	Cathepsin propeptide inhibitor domain (I29)	Domain
A, C	IPR039417	Papain-like cysteine endopeptidase	Domain
B, D	IPR027214	Cystatin	Family
B, D	IPR000010	Cystatin domain	Domain
B, D	IPR046350	Cystatin superfamily	Homologous Superfamily
B, D	IPR018073	Proteinase inhibitor I25, cystatin, conserved site	Conserved Site

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
A, C	OCS	Parent Component: CYS RESID: AA0556 PSI-MOD : L-cysteic acid (L-cysteine sulfonic acid) MOD:00460

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.