Annotations: 1VQ1

Crystal structure of N5-glutamine methyltransferase, HemK(EC 2.1.1.-) (TM0488) from Thermotoga maritima at 2.80 A resolution

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
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)
B	d1vq1b_	Alpha and beta proteins (a/b)	S-adenosyl-L-methionine-dependent methyltransferases	S-adenosyl-L-methionine-dependent methyltransferases	N5-glutamine methyltransferase, HemK	automated matches	(Thermotoga maritima MSB8 ) [TaxId: 243274 ],	SCOPe (2.08)
A	d1vq1a_	Alpha and beta proteins (a/b)	S-adenosyl-L-methionine-dependent methyltransferases	S-adenosyl-L-methionine-dependent methyltransferases	N5-glutamine methyltransferase, HemK	automated matches	(Thermotoga maritima MSB8 ) [TaxId: 243274 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	S-adenosyl-L-methionine-dependent methyltransferases	8033643	3000118	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	S-adenosyl-L-methionine-dependent methyltransferases	8033643	3000118	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)
B	Hydrolase_3	e1vq1B1	A: beta barrels	X: amino-terminal domain of OmpATb	H: amino-terminal domain of OmpATb	T: amino-terminal domain of OmpATb	F: Hydrolase_3	ECOD (v294.2)
A	Hydrolase_3	e1vq1A1	A: beta barrels	X: amino-terminal domain of OmpATb	H: amino-terminal domain of OmpATb	T: amino-terminal domain of OmpATb	F: Hydrolase_3	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.10.8.10	Mainly Alpha	Orthogonal Bundle	Helicase, Ruva Protein	domain 3	CATH (4.3.0)
B	3.40.50.150	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Vaccinia Virus protein VP39	CATH (4.3.0)
A	1.10.8.10	Mainly Alpha	Orthogonal Bundle	Helicase, Ruva Protein	domain 3	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, B	PF17827	PrmC N-terminal domain (PrmC_N)	PrmC N-terminal domain	This entry corresponds to the N-terminal alpha helical domain of the HemK protein. HemK is a methyltransferase enzyme that carries out the methylation of the N5 nitrogen of the glutamine found in the conserved GGQ motif of class-1 release factors [3] ...	This entry corresponds to the N-terminal alpha helical domain of the HemK protein. HemK is a methyltransferase enzyme that carries out the methylation of the N5 nitrogen of the glutamine found in the conserved GGQ motif of class-1 release factors [3].	Domain
A, B	PF05175	Methyltransferase small domain (MTS)	Methyltransferase small domain	This domain is found in ribosomal RNA small subunit methyltransferase C (eg Swiss:P44453) as well as other methyltransferases (eg Swiss:Q53742).	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	N5-glutamine methyltransferase, HemK	catalytic activity, acting on a protein transferase activity, transferring one-carbon groups N-methyltransferase activity protein methyltransferase activity protein-glutamine N-methyltransferase activity transferase activity methyltransferase activity catalytic activity S-adenosylmethionine-dependent methyltransferase activity binding nucleic acid binding peptide chain release factor N(5)-glutamine methyltransferase activity	methylation metabolic process cellular process cellular component disassembly protein-containing complex organization protein-containing complex disassembly primary metabolic process translation gene expression protein biosynthetic process macromolecule biosynthetic process cellular component organization biosynthetic process translational termination methylation metabolic process cellular process cellular component disassembly protein-containing complex organization protein-containing complex disassembly primary metabolic process translation gene expression protein biosynthetic process macromolecule biosynthetic process cellular component organization biosynthetic process translational termination cellular component organization or biogenesis protein metabolic process macromolecule metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR040758	Release factor glutamine methyltransferase, N-terminal domain	Domain
A, B	IPR019874	Release factor glutamine methyltransferase	Family
A, B	IPR002052	DNA methylase, N-6 adenine-specific, conserved site	Conserved Site
A, B	IPR029063	S-adenosyl-L-methionine-dependent methyltransferase superfamily	Homologous Superfamily
A, B	IPR004556	Methyltransferase HemK-like	Family
A, B	IPR050320	Protein N5-glutamine methyltransferase	Family
A, B	IPR007848	Methyltransferase small domain	Domain

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

Chains	Enzyme Name	Description	Catalytic Residues
A	peptide chain release factor N5-glutamine methyltransferase M-CSA #703	Post translational methylation of release factors on the glutamine residue of a conserved GGQ motif is required for efficient termination of protein synthesis. This methylation is performed by an N5-glutamine methyltransferase called HemK. Release factor 1 and 2 contain a conserved GGQ motif that is thought to play a role in activating or positioning the water molecule involved in hydrolysis at the peptidyl transferase active site.	Defined by 3 residues: PHE:A-112 [auth A-100]ASN:A-209 [auth A-197]PRO:A-210 [auth A-198] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 2.1.1 (PDB Primary Data) Search M-CSA Motif + EC 2.1.1 EC: 2.1.1.297 (UniProt) Search M-CSA Motif + EC 2.1.1.297

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