CBS Antibody – Mouse Monoclonal

CBS: Only known pyridoxal phosphate-dependent enzyme that contains heme. Important regulator of hydrogen sulfide, especially in the brain, utilizing cysteine instead of serine to catalyze the formation of hydrogen sulfide. Hydrogen sulfide is a gastratransmitter with signaling and cytoprotective effects such as acting as a neuromodulator in the brain to protect neurons against hypoxic injury. Defects in CBS are the cause of cystathionine beta- synthase deficiency (CBSD). CBSD is an enzymatic deficiency resulting in altered sulfur metabolism and homocystinuria. The clinical features of untreated homocystinuria due to CBS deficiency include myopia, ectopia lentis, mental retardation, skeletal anomalies resembling Marfan syndrome, and thromboembolic events. Light skin and hair can also be present. Biochemical features include increased urinary homocystine and methionine. Belongs to the cysteine synthase/cystathionine beta- synthase family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Other Amino Acids Metabolism - selenoamino acid; Amino Acid Metabolism - cysteine and methionine; Amino Acid Metabolism - glycine, serine and threonine; Lyase; EC 4.2.1.22

Chromosomal Location of Human Ortholog: 21q22.3

Cellular Component: intracellular membrane-bound organelle; nucleolus; nucleus; cytosol

Molecular Function: identical protein binding; protein binding; protein homodimerization activity; enzyme binding; cystathionine beta-synthase activity; ubiquitin protein ligase binding; metal ion binding; heme binding; pyridoxal phosphate binding

Biological Process: cysteine biosynthetic process via cystathionine; homocysteine catabolic process; sulfur amino acid metabolic process; L-serine metabolic process; transsulfuration; cysteine biosynthetic process from serine; homocysteine metabolic process; L-serine catabolic process; L-cysteine catabolic process

Disease: Homocystinuria Due To Cystathionine Beta-synthase Deficiency