1X1D | pdb_00001x1d

Crystal structure of BchU complexed with S-adenosyl-L-homocysteine and Zn-bacteriopheophorbide d

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	Acetyltransf_1	e1x1dA5	A: alpha bundles	X: DEATH domain	H: Ten stranded beta/alpha barrel	T: Ten stranded beta/alpha barrel	F: Acetyltransf_1	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)
A	3.40.50.150	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Vaccinia Virus protein VP39	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF08100	O-methyltransferase dimerisation domain (Dimerisation)	O-methyltransferase dimerisation domain	This domain is found at the N-terminus of plant O-methyltransferases involved in phenylpropanoid metabolism, including caffeic acid O-methyltransferase (COMT), isoflavone O-methyltransferase (IOMT), and chalcone O-methyltransferase (ChOMT). It mediat ...	This domain is found at the N-terminus of plant O-methyltransferases involved in phenylpropanoid metabolism, including caffeic acid O-methyltransferase (COMT), isoflavone O-methyltransferase (IOMT), and chalcone O-methyltransferase (ChOMT). It mediates dimerisation of these enzymes, which is critical for their activity [1-4]. The dimerisation domain forms the central core of the homodimer, with the SAM-binding domains located peripherally [1,3,4]. Dimerisation buries ~30% of the total surface area of the dimer [3]. The domain also contributes to forming the back wall of the substrate binding cavity of the partner monomer [2-4]. Structurally, the dimerisation domain consists primarily of alpha-helices [1-4]. Crystal structures reveal the domain is relatively rigid compared to the more mobile SAM-binding domain, which undergoes conformational changes upon substrate binding [4].ED A0A553NLB0.1/265-321; A0A553NLB0.1/265-293;	Domain
A	PF00891	O-methyltransferase domain (Methyltransf_2)	O-methyltransferase domain	This family includes a range of O-methyltransferases. These enzymes utilise S-adenosyl methionine.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	CrtF-related protein	transferase activity, transferring one-carbon groups transferase activity methyltransferase activity catalytic activity O-methyltransferase activity protein binding binding protein dimerization activity cation binding ion binding metal ion binding small molecule binding	pigment metabolic process porphyrin-containing compound biosynthetic process tetrapyrrole metabolic process light-independent bacteriochlorophyll biosynthetic process chlorophyll metabolic process pigment biosynthetic process bacteriochlorophyll biosynthetic process light-independent chlorophyll biosynthetic process tetrapyrrole biosynthetic process biosynthetic process metabolic process cellular process porphyrin-containing compound metabolic process chlorophyll biosynthetic process pigment metabolic process porphyrin-containing compound biosynthetic process tetrapyrrole metabolic process light-independent bacteriochlorophyll biosynthetic process chlorophyll metabolic process pigment biosynthetic process bacteriochlorophyll biosynthetic process light-independent chlorophyll biosynthetic process tetrapyrrole biosynthetic process biosynthetic process metabolic process cellular process porphyrin-containing compound metabolic process chlorophyll biosynthetic process methylation light-dependent chlorophyll biosynthetic process light-dependent bacteriochlorophyll biosynthetic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR029063	S-adenosyl-L-methionine-dependent methyltransferase superfamily	Homologous Superfamily
A	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A	IPR016461	O-methyltransferase-like	Family
A	IPR001077	O-methyltransferase, C-terminal domain	Domain
A	IPR036390	Winged helix DNA-binding domain superfamily	Homologous Superfamily
A	IPR012967	Caffeic acid 3-O-methyltransferase-like, dimerisation domain	Domain
A	IPR014088	Bacteriochlorophyllide d C-20 methyltransferase	Family

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.