Annotations: 1HQ6

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1hq6.1	Alpha and beta proteins (a+b)	Pyruvoyl-dependent histidine and arginine decarboxylases	Pyruvoyl-dependent histidine and arginine decarboxylases	Histidine decarboxylase	Histidine decarboxylase	(Lactobacillus sp. 30A ) [TaxId: 1593 ],	SCOPe (2.08)
C	d1hq6.2	Alpha and beta proteins (a+b)	Pyruvoyl-dependent histidine and arginine decarboxylases	Pyruvoyl-dependent histidine and arginine decarboxylases	Histidine decarboxylase	Histidine decarboxylase	(Lactobacillus sp. 30A ) [TaxId: 1593 ],	SCOPe (2.08)
B	d1hq6.1	Alpha and beta proteins (a+b)	Pyruvoyl-dependent histidine and arginine decarboxylases	Pyruvoyl-dependent histidine and arginine decarboxylases	Histidine decarboxylase	Histidine decarboxylase	(Lactobacillus sp. 30A ) [TaxId: 1593 ],	SCOPe (2.08)
D	d1hq6.2	Alpha and beta proteins (a+b)	Pyruvoyl-dependent histidine and arginine decarboxylases	Pyruvoyl-dependent histidine and arginine decarboxylases	Histidine decarboxylase	Histidine decarboxylase	(Lactobacillus sp. 30A ) [TaxId: 1593 ],	SCOPe (2.08)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	4.10.510.10	Few Secondary Structures	Irregular	Pyruvoyl-Dependent Histidine Decarboxylas	Chain A	CATH (4.3.0)
C	4.10.510.10	Few Secondary Structures	Irregular	Pyruvoyl-Dependent Histidine Decarboxylas	Chain A	CATH (4.3.0)
B	3.50.20.10	Alpha Beta	3-Layer(bba) Sandwich	Pyruvoyl-Dependent Histidine Decarboxylase	Chain B	CATH (4.3.0)
D	3.50.20.10	Alpha Beta	3-Layer(bba) Sandwich	Pyruvoyl-Dependent Histidine Decarboxylase	Chain B	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C	PF02329	Histidine carboxylase PI chain (HDC)	Histidine carboxylase PI chain	Histidine carboxylase catalyses the formation of histamine from histidine. Cleavage of the proenzyme PI chain yields two subunits, alpha and beta, which arrange as a hexamer (alpha beta)6.	Domain
B, D	PF02329	Histidine carboxylase PI chain (HDC)	Histidine carboxylase PI chain	Histidine carboxylase catalyses the formation of histamine from histidine. Cleavage of the proenzyme PI chain yields two subunits, alpha and beta, which arrange as a hexamer (alpha beta)6.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C	HISTIDINE DECARBOXYLASE	histidine decarboxylase activity carboxy-lyase activity lyase activity catalytic activity carbon-carbon lyase activity	organonitrogen compound metabolic process organic substance metabolic process oxoacid metabolic process cellular metabolic process carboxylic acid metabolic process metabolic process small molecule metabolic process cellular process histidine metabolic process organic acid metabolic process	-
B, D	HISTIDINE DECARBOXYLASE	histidine decarboxylase activity carboxy-lyase activity lyase activity catalytic activity carbon-carbon lyase activity	organonitrogen compound metabolic process organic substance metabolic process oxoacid metabolic process cellular metabolic process carboxylic acid metabolic process metabolic process small molecule metabolic process cellular process histidine metabolic process organic acid metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C	IPR016106	Histidine decarboxylase proenzyme, N-terminal	Homologous Superfamily
A, C	IPR003427	Histidine decarboxylase proenzyme	Family
A, C	IPR016104	Pyruvoyl-dependent histidine/arginine decarboxylase	Homologous Superfamily
A, C	IPR016105	Pyruvoyl-dependent histidine/arginine decarboxylase, 3-layer sandwich domain	Homologous Superfamily
B, D	IPR016106	Histidine decarboxylase proenzyme, N-terminal	Homologous Superfamily
B, D	IPR003427	Histidine decarboxylase proenzyme	Family
B, D	IPR016104	Pyruvoyl-dependent histidine/arginine decarboxylase	Homologous Superfamily
B, D	IPR016105	Pyruvoyl-dependent histidine/arginine decarboxylase, 3-layer sandwich domain	Homologous Superfamily

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
B, D	PYR	RESID: AA0127 PSI-MOD : pyruvic acid (Cys) MOD:00136 , pyruvic acid (Ser) MOD:00807 , pyruvic acid MOD:01154 , pyruvic acid (Tyr) MOD:01661

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.