1B8F | pdb_00001b8f

Histidine ammonia-lyase (HAL) from Pseudomonas putida

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
Structure Motif: Primary M-CSA Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1b8fa_	All alpha proteins	L-aspartase-like	L-aspartase-like	HAL/PAL-like	Histidine ammonia-lyase (HAL)	(Pseudomonas putida ) [TaxId: 303 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	L-aspartase-like	8035881	3001572	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	Lyase_aromatic_N	e1b8fA2	A: alpha arrays	X: L-aspartase N-terminal domain-like (From Topology)	H: L-aspartase N-terminal domain-like (From Topology)	T: L-aspartase N-terminal domain-like	F: Lyase_aromatic_N	ECOD (1.6)
A	Lyase_aromatic_C	e1b8fA1	A: alpha arrays	X: L-aspartase middle domain-like	H: L-aspartase middle domain-like (From Topology)	T: L-aspartase middle domain-like	F: Lyase_aromatic_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.275.10	Mainly Alpha	Orthogonal Bundle	Fumarase C	Chain B, domain 1	CATH (4.3.0)
A	1.20.200.10	Mainly Alpha	Up-down Bundle	Fumarase C	Chain A, domain 2	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Histidine ammonia-lyase	histidine ammonia-lyase activity lyase activity ammonia-lyase activity catalytic activity carbon-nitrogen lyase activity	-	cellular anatomical structure intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR024083	Fumarase/histidase, N-terminal	Homologous Superfamily
A	IPR001106	Aromatic amino acid lyase	Family
A	IPR022313	Phenylalanine/histidine ammonia-lyases, active site	Active Site
A	IPR008948	L-Aspartase-like	Homologous Superfamily
A	IPR005921	Histidine ammonia-lyase	Family

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	histidine ammonia-lyase M-CSA #417	This enzyme catalyses the first step in the degradation of histidine and the product, urocanic acid, is further metabolized to glutamate, the first step of the subpathway that synthesizes N-formimidoyl-L-glutamate from L-histidine. It is a member of the aromatic amino acid lyase family. The enzyme contains the cofactor 3,5-dihydro-5-methylidene-4H-imidazol-4-one (MIO), which is common to this family [PMID:17185228]. This unique cofactor is formed autocatalytically by cyclization and dehydration of the three amino-acid residues alanine, serine and glycine [PMID:10220322]. histidine ammonia-lyases (HAL) triggers the abstraction of the nonacidic beta protons of histidine, leaving the much more acidic ammonium hydrogen atoms untouched.	Defined by 7 residues: TYR:A-53HIS:A-83LEU:A-193 [auth A-195]ASP:A_2-278 [auth A_2-280]SER:A_2-281 [auth A_2-283]GLY:A-327 [auth A-329]ASN:A-412 [auth A-414] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 4.3.1.3 (PDB Primary Data) Search M-CSA Motif + EC 4.3.1.3

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.