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General description of the gene and the encoded protein(s) using information from HGNC and Ensembl, as well as predictions made by the Human Protein Atlas project.
Gene namei
Official gene symbol, which is typically a short form of the gene name, according to HGNC.
Assigned HPA protein class(es) for the encoded protein(s).
Disease related genes Enzymes Human disease related genes Metabolic proteins Plasma proteins Potential drug targets
Predicted locationi
All transcripts of all genes have been analyzed regarding the location(s) of corresponding protein based on prediction methods for signal peptides and transmembrane regions.
Genes with at least one transcript predicted to encode a secreted protein, according to prediction methods or to UniProt location data, have been further annotated and classified with the aim to determine if the corresponding protein(s) are secreted or actually retained in intracellular locations or membrane-attached.
Remaining genes, with no transcript predicted to encode a secreted protein, will be assigned the prediction-based location(s).
The annotated location overrules the predicted location, so that a gene encoding a predicted secreted protein that has been annotated as intracellular will have intracellular as the final location.
Gene information from Ensembl and Entrez, as well as links to available gene identifiers are displayed here. Information was retrieved from Ensembl if not indicated otherwise.
Chromosome
21
Cytoband
q22.3
Chromosome location (bp)
43053191 - 43076943
Number of transcriptsi
Number of protein-coding transcripts from the gene as defined by Ensembl.
Useful information about the protein provided by UniProt.
Hydro-lyase catalyzing the first step of the transsulfuration pathway, where the hydroxyl group of L-serine is displaced by L-homocysteine in a beta-replacement reaction to form L-cystathionine, the precursor of L-cysteine. This catabolic route allows the elimination of L-methionine and the toxic metabolite L-homocysteine 1,2,3. Also involved in the production of hydrogen sulfide, a gasotransmitter with signaling and cytoprotective effects on neurons (By similarity)....show less
Molecular function (UniProt)i
Keywords assigned by UniProt to proteins due to their particular molecular function.
Allosteric enzyme, Lyase
Biological process (UniProt)i
Keywords assigned by UniProt to proteins because they are involved in a particular biological process.
Amino-acid biosynthesis, Cysteine biosynthesis
Ligand (UniProt)i
Keywords assigned by UniProt to proteins because they bind, are associated with, or whose activity is dependent of some molecule.
Heme, Iron, Metal-binding, Pyridoxal phosphate
Gene summary (Entrez)i
Useful information about the gene from Entrez
The protein encoded by this gene acts as a homotetramer to catalyze the conversion of homocysteine to cystathionine, the first step in the transsulfuration pathway. The encoded protein is allosterically activated by adenosyl-methionine and uses pyridoxal phosphate as a cofactor. Defects in this gene can cause cystathionine beta-synthase deficiency (CBSD), which can lead to homocystinuria. This gene is a major contributor to cellular hydrogen sulfide production. Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Feb 2016]...show less
PROTEIN INFORMATIONi
The protein information section displays alternative protein-coding transcripts (splice variants) encoded by this gene according to the Ensembl database.
The Splice variant identifier links to the Ensembl website protein summary for the selected splice variant. The data in the Swissprot and TrEMBL columns links to corresponding pages in the UniProt database.
The protein classes assigned to this protein are shown if expanding the data in the protein class column. Parent protein classes are in bold font and subclasses are listed under the parent class.
The length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide and number of predicted transmembrane region(s) according to in-house majority decision methods based on sets of predictors are also reported.
Enzymes ENZYME proteins Lyases Metabolic proteins Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Plasma proteins Disease related genes Potential drug targets Human disease related genes Congenital disorders of metabolism Congenital disorders of amino acid metabolism Mapped to neXtProt neXtProt - Evidence at protein level Protein evidence (Kim et al 2014) Protein evidence (Ezkurdia et al 2014)
Enzymes ENZYME proteins Lyases Metabolic proteins Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Plasma proteins Disease related genes Potential drug targets Human disease related genes Congenital disorders of metabolism Congenital disorders of amino acid metabolism Mapped to neXtProt neXtProt - Evidence at protein level Protein evidence (Kim et al 2014) Protein evidence (Ezkurdia et al 2014)
Enzymes ENZYME proteins Lyases Metabolic proteins Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Plasma proteins Disease related genes Potential drug targets Human disease related genes Congenital disorders of metabolism Congenital disorders of amino acid metabolism Mapped to neXtProt neXtProt - Evidence at protein level Protein evidence (Ezkurdia et al 2014)
Enzymes ENZYME proteins Lyases Metabolic proteins Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Plasma proteins Disease related genes Potential drug targets Human disease related genes Congenital disorders of metabolism Congenital disorders of amino acid metabolism Mapped to neXtProt neXtProt - Evidence at protein level Protein evidence (Kim et al 2014) Protein evidence (Ezkurdia et al 2014)
Metabolic proteins Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Human disease related genes Congenital disorders of metabolism Congenital disorders of amino acid metabolism Protein evidence (Ezkurdia et al 2014)
Metabolic proteins SPOCTOPUS predicted membrane proteins Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Human disease related genes Congenital disorders of metabolism Congenital disorders of amino acid metabolism Protein evidence (Ezkurdia et al 2014)
Show all
GO:0006535[cysteine biosynthetic process from serine] GO:0006790[sulfur compound metabolic process]
Metabolic proteins Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Human disease related genes Congenital disorders of metabolism Congenital disorders of amino acid metabolism Protein evidence (Ezkurdia et al 2014)
Metabolic proteins Predicted intracellular proteins Intracellular proteins predicted by MDM and MDSEC Human disease related genes Congenital disorders of metabolism Congenital disorders of amino acid metabolism Protein evidence (Ezkurdia et al 2014)
The Human Protein Atlas project is funded
