4A1O

Crystal structure of Mycobacterium tuberculosis PurH complexed with AICAR and a novel nucleotide CFAIR, at 2.48 A resolution.

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	AICARFT_IMPCHas_1st	e4a1oA5	A: a+b three layers	X: Cytidine deaminase-like (From Topology)	H: Cytidine deaminase-like (From Topology)	T: Cytidine deaminase-like	F: AICARFT_IMPCHas_1st	ECOD (1.6)
A	AICARFT_IMPCHas_2nd	e4a1oA4	A: a+b three layers	X: Cytidine deaminase-like (From Topology)	H: Cytidine deaminase-like (From Topology)	T: Cytidine deaminase-like	F: AICARFT_IMPCHas_2nd	ECOD (1.6)
A	MGS	e4a1oA3	A: a/b three-layered sandwiches	X: Methylglyoxal synthase-like (From Topology)	H: Methylglyoxal synthase-like (From Topology)	T: Methylglyoxal synthase-like	F: MGS	ECOD (1.6)
B	AICARFT_IMPCHas_1st	e4a1oB5	A: a+b three layers	X: Cytidine deaminase-like (From Topology)	H: Cytidine deaminase-like (From Topology)	T: Cytidine deaminase-like	F: AICARFT_IMPCHas_1st	ECOD (1.6)
B	AICARFT_IMPCHas_2nd	e4a1oB4	A: a+b three layers	X: Cytidine deaminase-like (From Topology)	H: Cytidine deaminase-like (From Topology)	T: Cytidine deaminase-like	F: AICARFT_IMPCHas_2nd	ECOD (1.6)
B	MGS	e4a1oB3	A: a/b three-layered sandwiches	X: Methylglyoxal synthase-like (From Topology)	H: Methylglyoxal synthase-like (From Topology)	T: Methylglyoxal synthase-like	F: MGS	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.1380	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Methylglyoxal synthase-like domain	CATH (4.3.0)
A	3.40.140.20	Alpha Beta	3-Layer(aba) Sandwich	Cytidine Deaminase	domain 2	CATH (4.3.0)
B	3.40.50.1380	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Methylglyoxal synthase-like domain	CATH (4.3.0)
B	3.40.140.20	Alpha Beta	3-Layer(aba) Sandwich	Cytidine Deaminase	domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF02142	MGS-like domain (MGS)	MGS-like domain	This domain composes the whole protein of methylglyoxal synthetase and the domain is also found in Carbamoyl phosphate synthetase (CPS) where it forms a regulatory domain that binds to the allosteric effector ornithine. This family also includes ino ...	This domain composes the whole protein of methylglyoxal synthetase and the domain is also found in Carbamoyl phosphate synthetase (CPS) where it forms a regulatory domain that binds to the allosteric effector ornithine. This family also includes inosicase. The known structures in this family show a common phosphate binding site [1].	Domain
A, B	PF01808	AICARFT/IMPCHase bienzyme (AICARFT_IMPCHas)	AICARFT/IMPCHase bienzyme	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	BIFUNCTIONAL PURINE BIOSYNTHESIS PROTEIN PURH	hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in cyclic amidines IMP cyclohydrolase activity cyclohydrolase activity hydrolase activity catalytic activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds phosphoribosylaminoimidazolecarboxamide formyltransferase activity transferase activity, transferring one-carbon groups transferase activity hydroxymethyl-, formyl- and related transferase activity	ribose phosphate metabolic process IMP metabolic process purine ribonucleoside monophosphate biosynthetic process nucleotide biosynthetic process organonitrogen compound biosynthetic process carbohydrate derivative metabolic process purine ribonucleotide biosynthetic process nucleobase-containing compound metabolic process ribonucleotide biosynthetic process purine nucleoside monophosphate biosynthetic process purine ribonucleoside monophosphate metabolic process purine nucleotide metabolic process organic substance metabolic process ribonucleotide metabolic process ribonucleoside monophosphate metabolic process ribose phosphate metabolic process IMP metabolic process purine ribonucleoside monophosphate biosynthetic process nucleotide biosynthetic process organonitrogen compound biosynthetic process carbohydrate derivative metabolic process purine ribonucleotide biosynthetic process nucleobase-containing compound metabolic process ribonucleotide biosynthetic process purine nucleoside monophosphate biosynthetic process purine ribonucleoside monophosphate metabolic process purine nucleotide metabolic process organic substance metabolic process ribonucleotide metabolic process ribonucleoside monophosphate metabolic process nucleobase-containing small molecule metabolic process purine-containing compound biosynthetic process purine nucleoside monophosphate metabolic process phosphate-containing compound metabolic process organic substance biosynthetic process small molecule metabolic process phosphorus metabolic process ribose phosphate biosynthetic process nucleoside monophosphate metabolic process nucleoside phosphate metabolic process carbohydrate derivative biosynthetic process organonitrogen compound metabolic process cellular metabolic process primary metabolic process nucleotide metabolic process nucleobase-containing compound biosynthetic process nucleoside monophosphate biosynthetic process purine-containing compound metabolic process organic cyclic compound metabolic process IMP biosynthetic process biosynthetic process organophosphate metabolic process organophosphate biosynthetic process organic cyclic compound biosynthetic process nucleoside phosphate biosynthetic process metabolic process cellular process 'de novo' IMP biosynthetic process purine ribonucleotide metabolic process ribonucleoside monophosphate biosynthetic process purine nucleotide biosynthetic process	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol cell periphery plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR024051	AICAR transformylase, duplicated domain superfamily	Homologous Superfamily
A, B	IPR011607	Methylglyoxal synthase-like domain	Domain
A, B	IPR036914	Methylglyoxal synthase-like domain superfamily	Homologous Superfamily
A, B	IPR002695	Bifunctional purine biosynthesis protein PurH-like	Family
A, B	IPR016193	Cytidine deaminase-like	Homologous Superfamily

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.