9SSU | pdb_00009ssu

Human Methionine Synthase With Methylcobalamin, N-Half From Full-Length

External Resource: Annotation

Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00809	Pterin binding enzyme (Pterin_bind)	Pterin binding enzyme	This family includes a variety of pterin binding enzymes that all adopt a TIM barrel fold. The family includes dihydropteroate synthase EC:2.5.1.15 as well as a group methyltransferase enzymes including methyltetrahydrofolate, corrinoid iron-sulfur p ...	This family includes a variety of pterin binding enzymes that all adopt a TIM barrel fold. The family includes dihydropteroate synthase EC:2.5.1.15 as well as a group methyltransferase enzymes including methyltetrahydrofolate, corrinoid iron-sulfur protein methyltransferase (MeTr) Swiss:Q46389 that catalyses a key step in the Wood-Ljungdahl pathway of carbon dioxide fixation. It transfers the N5-methyl group from methyltetrahydrofolate (CH3-H4folate) to a cob(I)amide centre in another protein, the corrinoid iron-sulfur protein. MeTr is a member of a family of proteins that includes methionine synthase and methanogenic enzymes that activate the methyl group of methyltetra-hydromethano(or -sarcino)pterin [2].	Domain
A	PF02574	Homocysteine S-methyltransferase (S-methyl_trans)	Homocysteine S-methyltransferase	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Methionine synthase	vitamin binding binding cobalamin binding tetrapyrrole binding heterocyclic compound binding small molecule binding methionine synthase activity 5-methyltetrahydrofolate-dependent methyltransferase activity transferase activity, transferring one-carbon groups S-methyltransferase activity transferase activity methyltransferase activity catalytic activity cation binding vitamin binding binding cobalamin binding tetrapyrrole binding heterocyclic compound binding small molecule binding methionine synthase activity 5-methyltetrahydrofolate-dependent methyltransferase activity transferase activity, transferring one-carbon groups S-methyltransferase activity transferase activity methyltransferase activity catalytic activity cation binding transition metal ion binding zinc ion binding ion binding metal ion binding	response to stimulus response to stress response to wounding response to axon injury methylation metabolic process cellular process homocysteine metabolic process oxoacid metabolic process sulfur amino acid metabolic process carboxylic acid metabolic process amino acid metabolic process primary metabolic process organic acid metabolic process response to stimulus response to stress response to wounding response to axon injury methylation metabolic process cellular process homocysteine metabolic process oxoacid metabolic process sulfur amino acid metabolic process carboxylic acid metabolic process amino acid metabolic process primary metabolic process organic acid metabolic process alpha-amino acid metabolic process non-proteinogenic amino acid metabolic process small molecule metabolic process sulfur compound metabolic process cobalamin metabolic process tetrapyrrole metabolic process aspartate family amino acid biosynthetic process organic acid biosynthetic process carboxylic acid biosynthetic process methionine biosynthetic process small molecule biosynthetic process L-amino acid biosynthetic process methionine metabolic process L-amino acid metabolic process proteinogenic amino acid metabolic process amino acid biosynthetic process sulfur compound biosynthetic process biosynthetic process proteinogenic amino acid biosynthetic process sulfur amino acid biosynthetic process alpha-amino acid biosynthetic process folic acid-containing compound metabolic process modified amino acid metabolic process tetrahydrofolate metabolic process pteridine-containing compound metabolic process developmental process multicellular organism development multicellular organismal process anatomical structure development nervous system development system development cellular response to stimulus cellular developmental process cell projection organization cell development neuron projection development regeneration neuron projection regeneration cellular component organization neurogenesis axon regeneration neuron differentiation cellular response to stress cell differentiation cellular component organization or biogenesis plasma membrane bounded cell projection organization axon development generation of neurons neuron development cellular response to nitrogen compound response to oxygen-containing compound response to nitrogen compound cellular response to oxygen-containing compound cellular response to nitric oxide cellular response to chemical stimulus response to chemical response to nitric oxide cellular response to reactive nitrogen species	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR003759	Cobalamin (vitamin B12)-binding module, cap domain	Domain
A	IPR006158	Cobalamin (vitamin B12)-binding domain	Domain
A	IPR003726	Homocysteine-binding domain	Domain
A	IPR004223	Vitamin B12-dependent methionine synthase, activation domain	Domain
A	IPR000489	Pterin-binding domain	Domain
A	IPR036724	Cobalamin-binding domain superfamily	Homologous Superfamily
A	IPR036594	Methionine synthase domain	Homologous Superfamily
A	IPR037010	Vitamin B12-dependent methionine synthase, activation domain superfamily	Homologous Superfamily
A	IPR050554	Methionine Synthase/Corrinoid	Family
A	IPR011005	Dihydropteroate synthase-like superfamily	Homologous Superfamily
A	IPR033706	Methionine synthase, B12-binding domain	Domain
A	IPR036589	Homocysteine-binding domain superfamily	Homologous Superfamily
A	IPR011822	Cobalamin-dependent methionine synthase	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q99707	follicular lymphoma neural tube defects, folate-sensitive homocystinuria cleft palate hematologic disease lymphoma Down syndrome methylcobalamin deficiency type cblG Leukoencephalopathies male infertility breast carcinoma ovarian cancer hyperhomocysteinemia progressive supranuclear palsy intellectual disability follicular lymphoma neural tube defects, folate-sensitive homocystinuria cleft palate hematologic disease lymphoma Down syndrome methylcobalamin deficiency type cblG Leukoencephalopathies male infertility breast carcinoma ovarian cancer hyperhomocysteinemia progressive supranuclear palsy intellectual disability bipolar disorder myopathy peripheral nervous system disease inborn errors of metabolism psoriasis breast cancer cleft lip medulloblastoma depressive disorder neural tube defect osteosarcoma peripheral neuropathy inborn vitamin B12 deficiency schizophrenia leukoencephalopathy with vanishing white matter tethered spinal cord syndrome attention deficit hyperactivity disorder, inattentive type congenital anemia digestive system disease methylmalonic acidemia

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.