Annotations: 8QA6

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	zf-C2H2_16	e8qa6B1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: zf-C2H2_16	ECOD (develop294)
A	zf-C2H2_16	e8qa6A1	A: alpha bundles	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: zf-C2H2_16	ECOD (develop294)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF02219	Methylenetetrahydrofolate reductase (MTHFR)	Methylenetetrahydrofolate reductase	This family includes the 5,10-methylenetetrahydrofolate reductase EC:1.7.99.5 from bacteria and methylenetetrahydrofolate reductase EC: 1.5.1.20 from eukaryotes. The structure for this domain is known [1] to be a TIM barrel.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Methylenetetrahydrofolate reductase (NADPH)	FAD binding flavin adenine dinucleotide binding binding nucleoside phosphate binding ion binding anion binding nucleotide binding heterocyclic compound binding small molecule binding oxidoreductase activity oxidoreductase activity, acting on the CH-NH group of donors, NAD or NADP as acceptor oxidoreductase activity, acting on the CH-NH group of donors methylenetetrahydrofolate reductase [NAD(P)H] activity catalytic activity FAD binding flavin adenine dinucleotide binding binding nucleoside phosphate binding ion binding anion binding nucleotide binding heterocyclic compound binding small molecule binding oxidoreductase activity oxidoreductase activity, acting on the CH-NH group of donors, NAD or NADP as acceptor oxidoreductase activity, acting on the CH-NH group of donors methylenetetrahydrofolate reductase [NAD(P)H] activity catalytic activity purine nucleotide binding adenyl nucleotide binding NADP binding protein-containing complex binding methylenetetrahydrofolate reductase (NADPH) activity modified amino acid binding	response to acid chemical response to stimulus response to chemical response to amino acid response to xenobiotic stimulus response to vitamin B2 response to nutrient levels response to nutrient response to oxygen-containing compound response to nitrogen compound response to vitamin S-adenosylmethionine metabolic process sulfur compound metabolic process metabolic process response to acid chemical response to stimulus response to chemical response to amino acid response to xenobiotic stimulus response to vitamin B2 response to nutrient levels response to nutrient response to oxygen-containing compound response to nitrogen compound response to vitamin S-adenosylmethionine metabolic process sulfur compound metabolic process metabolic process cellular process response to peptide response to cytokine response to interleukin-1 folic acid-containing compound metabolic process tetrahydrofolate interconversion modified amino acid metabolic process small molecule metabolic process tetrahydrofolate metabolic process pteridine-containing compound metabolic process one-carbon metabolic process oxoacid metabolic process sulfur amino acid metabolic process carboxylic acid metabolic process amino acid metabolic process primary metabolic process methionine metabolic process organic acid metabolic process alpha-amino acid metabolic process multicellular organismal process embryonic epithelial tube formation chordate embryonic development tube formation embryo development multicellular organism development epithelial tube formation tube morphogenesis primary neural tube formation embryo development ending in birth or egg hatching anatomical structure development epithelial tube morphogenesis system development developmental process morphogenesis of embryonic epithelium epithelium development neural tube development tube development embryonic morphogenesis morphogenesis of an epithelium nervous system development tissue development anatomical structure morphogenesis tissue morphogenesis neural tube closure neural tube formation anatomical structure formation involved in morphogenesis tube closure homocysteine metabolic process non-proteinogenic amino acid metabolic process cellular component organization chromatin organization heterochromatin organization cellular component organization or biogenesis response to decreased oxygen levels response to hypoxia response to stress response to oxygen levels response to abiotic stimulus response to folic acid	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR004621	Methylenetetrahydrofolate reductase, catalytic domain, eukaryotes	Domain
A, B	IPR029041	FAD-linked oxidoreductase-like	Homologous Superfamily
A, B	IPR003171	Methylenetetrahydrofolate reductase-like, catalytic domain	Domain
A, B	IPR053806	MTHFR, SAM-binding regulatory domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	Pharos: P42898	thrombophilia neural tube defect schizophrenia Down syndrome pulmonary embolism homocystinuria due to methylene tetrahydrofolate reductase deficiency rheumatoid arthritis spina bifida leukopenia Alzheimer disease Microvascular Angina homocystinuria hyperhomocysteinemia B-cell chronic lymphocytic leukemia follicular lymphoma thrombophilia neural tube defect schizophrenia Down syndrome pulmonary embolism homocystinuria due to methylene tetrahydrofolate reductase deficiency rheumatoid arthritis spina bifida leukopenia Alzheimer disease Microvascular Angina homocystinuria hyperhomocysteinemia B-cell chronic lymphocytic leukemia follicular lymphoma neutropenia thrombocytopenia vascular disease endogenous depression anencephaly Crohn disease spinal cord disease malignant colon neoplasm graft versus host disease cervical cancer thyrotoxicosis allergic disease myelomeningocele coronary restenosis male infertility neural tube defects, folate-sensitive inherited blood coagulation disorder bipolar disorder breast carcinoma tethered spinal cord syndrome diabetic peripheral angiopathy melancholia alopecia lymphoma urinary bladder cancer prostate cancer uterine cervix carcinoma in situ colorectal cancer anemia endometrial carcinoma nervous system disorder female infertility brain ischemia intracranial sinus thrombosis cardiovascular disease kidney disease cerebrovascular disorder liver disease hematologic disease clubfoot colorectal carcinoma reticulum cell sarcoma inborn errors of metabolism skin disease major depressive disorder autism benign colon neoplasm intellectual disability breast cancer non-Hodgkin lymphoma osteosarcoma leukoencephalopathy with vanishing white matter peripheral nervous system disease cleft lip colonic neoplasm drug-induced liver injury androgenetic alopecia endometrial cancer hypertensive disorder congenital heart disease inborn vitamin B12 deficiency Crohn's colitis cystic fibrosis neurotic disorder gastric cancer non-small cell lung carcinoma isolated anencephaly/exencephaly depressive disorder gastrointestinal mucositis ovarian cancer thrombophilia due to thrombin defect cervical intraepithelial neoplasia peripheral neuropathy digestive system disease hemochromatosis type 1 childhood acute lymphoblastic leukemia psoriasis drug-induced hepatitis myotonic dystrophy type 1 ileocolitis coronary artery disease craniorachischisis lymphosarcoma atrial fibrillation neurenteric cyst iniencephaly sudden sensorineural hearing loss acute kidney failure gastric neoplasm nutritional deficiency disease gastrointestinal stromal tumor pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia diastematomyelia thrombotic disease lung benign neoplasm alopecia areata hemophilia B urinary bladder neoplasm hereditary diffuse gastric adenocarcinoma

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.