6KZF

Racemic X-ray Structure of Calcicludine

External Resource: Annotation

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

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	BPTI-like	8038565	3000628	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF00014	e6kzfA1	A: few secondary structure elements	X: BPTI-like (From Topology)	H: BPTI-like (From Topology)	T: BPTI-like	F: PF00014	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	4.10.410.10	Few Secondary Structures	Irregular	Factor Xa Inhibitor	Pancreatic trypsin inhibitor Kunitz domain	CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00014	Kunitz/Bovine pancreatic trypsin inhibitor domain (Kunitz_BPTI)	Kunitz/Bovine pancreatic trypsin inhibitor domain	Indicative of a protease inhibitor, usually a serine protease inhibitor. Structure is a disulfide rich alpha+beta fold. BPTI (bovine pancreatic trypsin inhibitor) is an extensively studied model structure. Certain family members are similar to the ...	Indicative of a protease inhibitor, usually a serine protease inhibitor. Structure is a disulfide rich alpha+beta fold. BPTI (bovine pancreatic trypsin inhibitor) is an extensively studied model structure. Certain family members are similar to the tick anticoagulant peptide (TAP, Swiss:P17726). This is a highly selective inhibitor of factor Xa in the blood coagulation pathways [1]. TAP molecules are highly dipolar [2], and are arranged to form a twisted two- stranded antiparallel beta-sheet followed by an alpha helix [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Kunitz-type serine protease inhibitor homolog calcicludine	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity serine-type endopeptidase inhibitor activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity channel regulator activity ion channel regulator activity calcium channel regulator activity transporter regulator activity toxin activity	-	extracellular region cellular anatomical entity
B	D-calcicludine	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002223	Pancreatic trypsin inhibitor Kunitz domain	Domain
A	IPR020901	Proteinase inhibitor I2, Kunitz, conserved site	Conserved Site
A	IPR036880	Pancreatic trypsin inhibitor Kunitz domain superfamily	Homologous Superfamily

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
A	ABA	Parent Component: ALA RESID: AA0253 , AA0409 PSI-MOD : S-(2-aminovinyl)-3-methyl-D-cysteine MOD:00258 , L-2-aminobutanoic acid (Glu) MOD:00819
B	DAL	RESID: AA0253 , AA0409 , AA0111 , AA0191 PSI-MOD : S-(2-aminovinyl)-3-methyl-D-cysteine MOD:00258 , L-2-aminobutanoic acid (Glu) MOD:00819 , meso-lanthionine MOD:00120 , D-alanine (Ala) MOD:00198 , D-alanine (Ser) MOD:00858 , D-alanine MOD:00862
B	DAR	RESID: AA0253 , AA0409 , AA0111 , AA0191
B	DCY	RESID: AA0253 , AA0409 , AA0111 , AA0191
B	DGL	RESID: AA0253 , AA0409 , AA0111 , AA0191
B	DGN	RESID: AA0253 , AA0409 , AA0111 , AA0191
B	DIL	RESID: AA0253 , AA0409 , AA0111 , AA0191 , AA0192 PSI-MOD : S-(2-aminovinyl)-3-methyl-D-cysteine MOD:00258 , L-2-aminobutanoic acid (Glu) MOD:00819 , meso-lanthionine MOD:00120 , D-alanine (Ala) MOD:00198 , D-alanine (Ser) MOD:00858 , D-alanine MOD:00862 , D-allo-isoleucine MOD:00199
B	DLE	RESID: AA0253 , AA0409 , AA0111 , AA0191 , AA0192 , AA0197 PSI-MOD : S-(2-aminovinyl)-3-methyl-D-cysteine MOD:00258 , L-2-aminobutanoic acid (Glu) MOD:00819 , meso-lanthionine MOD:00120 , D-alanine (Ala) MOD:00198 , D-alanine (Ser) MOD:00858 , D-alanine MOD:00862 , D-allo-isoleucine MOD:00199 , D-leucine MOD:00204
B	DLY	RESID: AA0253 , AA0409 , AA0111 , AA0191 , AA0192 , AA0197
B	DPN	RESID: AA0253 , AA0409 , AA0111 , AA0191 , AA0192 , AA0197 , AA0194 PSI-MOD : S-(2-aminovinyl)-3-methyl-D-cysteine MOD:00258 , L-2-aminobutanoic acid (Glu) MOD:00819 , meso-lanthionine MOD:00120 , D-alanine (Ala) MOD:00198 , D-alanine (Ser) MOD:00858 , D-alanine MOD:00862 , D-allo-isoleucine MOD:00199 , D-leucine MOD:00204 , D-phenylalanine MOD:00201
B	DPR	RESID: AA0253 , AA0409 , AA0111 , AA0191 , AA0192 , AA0197 , AA0194
B	DSG	RESID: AA0253 , AA0409 , AA0111 , AA0191 , AA0192 , AA0197 , AA0194 , AA0196 , AA0622 PSI-MOD : S-(2-aminovinyl)-3-methyl-D-cysteine MOD:00258 , L-2-aminobutanoic acid (Glu) MOD:00819 , meso-lanthionine MOD:00120 , D-alanine (Ala) MOD:00198 , D-alanine (Ser) MOD:00858 , D-alanine MOD:00862 , D-allo-isoleucine MOD:00199 , D-leucine MOD:00204 , D-phenylalanine MOD:00201 , D-asparagine MOD:00203 , 2-(L-cystein-S-yl)-D-asparagine MOD:01985
B	DSN	RESID: AA0253 , AA0409 , AA0111 , AA0191 , AA0192 , AA0197 , AA0194 , AA0196 , AA0622 , AA0195 , AA0624 PSI-MOD : S-(2-aminovinyl)-3-methyl-D-cysteine MOD:00258 , L-2-aminobutanoic acid (Glu) MOD:00819 , meso-lanthionine MOD:00120 , D-alanine (Ala) MOD:00198 , D-alanine (Ser) MOD:00858 , D-alanine MOD:00862 , D-allo-isoleucine MOD:00199 , D-leucine MOD:00204 , D-phenylalanine MOD:00201 , D-asparagine MOD:00203 , 2-(L-cystein-S-yl)-D-asparagine MOD:01985 , D-serine (Ser) MOD:00202 , D-serine MOD:00891 , D-serine (Cys) MOD:00892 , 2-(L-cystein-S-yl)-D-serine MOD:01987
B	DTH	RESID: AA0253 , AA0409 , AA0111 , AA0191 , AA0192 , AA0197 , AA0194 , AA0196 , AA0622 , AA0195 , AA0624 , AA0199 PSI-MOD : S-(2-aminovinyl)-3-methyl-D-cysteine MOD:00258 , L-2-aminobutanoic acid (Glu) MOD:00819 , meso-lanthionine MOD:00120 , D-alanine (Ala) MOD:00198 , D-alanine (Ser) MOD:00858 , D-alanine MOD:00862 , D-allo-isoleucine MOD:00199 , D-leucine MOD:00204 , D-phenylalanine MOD:00201 , D-asparagine MOD:00203 , 2-(L-cystein-S-yl)-D-asparagine MOD:01985 , D-serine (Ser) MOD:00202 , D-serine MOD:00891 , D-serine (Cys) MOD:00892 , 2-(L-cystein-S-yl)-D-serine MOD:01987 , D-allo-threonine MOD:00863
B	DTR	RESID: AA0253 , AA0409 , AA0111 , AA0191 , AA0192 , AA0197 , AA0194 , AA0196 , AA0622 , AA0195 , AA0624 , AA0199 , AA0198 PSI-MOD : S-(2-aminovinyl)-3-methyl-D-cysteine MOD:00258 , L-2-aminobutanoic acid (Glu) MOD:00819 , meso-lanthionine MOD:00120 , D-alanine (Ala) MOD:00198 , D-alanine (Ser) MOD:00858 , D-alanine MOD:00862 , D-allo-isoleucine MOD:00199 , D-leucine MOD:00204 , D-phenylalanine MOD:00201 , D-asparagine MOD:00203 , 2-(L-cystein-S-yl)-D-asparagine MOD:01985 , D-serine (Ser) MOD:00202 , D-serine MOD:00891 , D-serine (Cys) MOD:00892 , 2-(L-cystein-S-yl)-D-serine MOD:01987 , D-allo-threonine MOD:00863 , D-tryptophan MOD:00205
B	DTY	RESID: AA0253 , AA0409 , AA0111 , AA0191 , AA0192 , AA0197 , AA0194 , AA0196 , AA0622 , AA0195 , AA0624 , AA0199 , AA0198
B	DVA	RESID: AA0253 , AA0409 , AA0111 , AA0191 , AA0192 , AA0197 , AA0194 , AA0196 , AA0622 , AA0195 , AA0624 , AA0199 , AA0198 , AA0200 PSI-MOD : S-(2-aminovinyl)-3-methyl-D-cysteine MOD:00258 , L-2-aminobutanoic acid (Glu) MOD:00819 , meso-lanthionine MOD:00120 , D-alanine (Ala) MOD:00198 , D-alanine (Ser) MOD:00858 , D-alanine MOD:00862 , D-allo-isoleucine MOD:00199 , D-leucine MOD:00204 , D-phenylalanine MOD:00201 , D-asparagine MOD:00203 , 2-(L-cystein-S-yl)-D-asparagine MOD:01985 , D-serine (Ser) MOD:00202 , D-serine MOD:00891 , D-serine (Cys) MOD:00892 , 2-(L-cystein-S-yl)-D-serine MOD:01987 , D-allo-threonine MOD:00863 , D-tryptophan MOD:00205 , D-valine MOD:00705

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 R01GM133198.