HIP4; CBS

For Research Use Only. Not for use in diagnostic procedures.

Polyclonal

IgG

Rabbit

Affinity Purification

1mg/ml (lot specific)

Store at -20 degree C (regular) or -80 degree C (long term). Avoid freeze / thaw cycles.
Buffer: PBS with 0.02% sodium azide, 50% glycerol, pH7.3.

Small volumes of anti-CBS antibody vial(s) may occasionally become entrapped in the seal of the product vial during shipment and storage. If necessary, briefly centrifuge the vial on a tabletop centrifuge to dislodge any liquid in the container`s cap. Certain products may require to ship with dry ice and additional dry ice fee may apply.

The CBS gene encodes cystathionine beta-synthase, which catalyzes the first irreversible step of transsulfuration. The CBS enzyme is a homotetramer of 63-kD subunits and requires pyridoxal phosphate and heme for activity(PMID:11230183). CBS protein is localized in most areas of the brain, but predominantly in the cell bodies and neuronal processes of Purkinje cells and Ammon's horn neurons(PMID:12588964). This antibody is specific to CBS.

Polyclonal

Western Blot (WB), Immunohistochemistry (IHC), Immunofluorescence (IF)

WB: 1:500 - 1:2000
IHC: 1:50 - 1:200
IF: 1:50 - 1:200

Western blot analysis of extracts of various cell lines, using CBS antibody at 1:1000 dilution.
Secondary antibody: HRP Goat Anti-Rabbit IgG (H+L) (MBS128200) at 1:10000 dilution.
Lysates/proteins: 25ug per lane.
Blocking buffer: 3% nonfat dry milk in TBST.

Immunofluorescence analysis of U2OS cells using CBS antibody. Blue: DAPI for nuclear staining.

551

cystathionine-beta-synthase

cystathionine beta-synthase; beta-thionase; serine sulfhydrase; methylcysteine synthase

Cystathionine beta-synthase

CBS_HUMAN

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. Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, May 2010]

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

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