Anti-CBS Antibody Picoband®

CBS, Cystathionine Beta-Synthase, 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. The CBS gene, which is mapped to chromosome 21q22, contains 23 exons, ranging in size from 42 to 299 bp. The human CBS protein can substitute for the endogenous yeast CBS protein in Saccharomyces cerevisiae. The catalytic domain of the CBS protein is located in the N-terminal 409 amino acids, and a regulatory domain is located in the C-terminal 142 amino acids.A mutation that deletes the C-terminal 145 amino acids of CBS could restore activity of several CBS mutant alleles found in homocystinurics.

Angiogenesis, Cancer, Cardiovascular, Developmental Biology, Growth Factors, Growth Factors/Hormones, Invasion/Microenvironment, Neural Stem Cells, Neurogenesis, Neurology Process, Neuroscience, Organogenesis, Signal Transduction, Stem Cells

Auxiliary protein of DNA polymerase delta and is involved in the control of eukaryotic DNA replication by increasing the polymerase's processibility during elongation of the leading strand. Induces a robust stimulatory effect on the 3'-5' exonuclease and 3'-phosphodiesterase, but not apurinic-apyrimidinic (AP) endonuclease, APEX2 activities. Has to be loaded onto DNA in order to be able to stimulate APEX2. Plays a key role in DNA damage response (DDR) by being conveniently positioned at the replication fork to coordinate DNA replication with DNA repair and DNA damage tolerance pathways (PubMed:24939902) . Acts as a loading platform to recruit DDR proteins that allow completion of DNA replication after DNA damage and promote postreplication repair: Monoubiquitinated PCNA leads to recruitment of translesion (TLS) polymerases, while 'Lys-63'-linked polyubiquitination of PCNA is involved in error-free pathway and employs recombination mechanisms to synthesize across the lesion (PubMed:24695737) .

1. Munke, M., Kraus, J., Watkins, P., Tanzi, R., Gusella, J., Millington Ward, A., Watson, M., Francke, U.Homocystinuria gene on human chromosome 21 mapped with cloned cystathionine beta-synthase probe and in situ hybridization of other chromosome 21 probes. (Abstract) Cytogenet. Cell Genet. 40: 706-707, 1985. 2. Kraus, J. P., Oliveriusova, J., Sokolova, J., Kraus, E., Vlcek, C., de Franchis, R., Maclean, K. N., Bao, L., Bukovska, G., Patterson, D., Paces, V., Ansorge, W., Kozich, V.The human cystathionine beta-synthase (CBS) gene: complete sequence, alternative splicing, and polymorphisms.Genomics 52: 312-324, 1998. 3. Kruger, W. D., Cox, D. R.A yeast system for expression of human cystathionine beta-synthase: structural and functional conservation of the human and yeast genes.Proc. Nat. Acad. Sci. 91: 6614-6618, 1994.

At -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freezing and thawing.