• Navigation
  • Register My DNA Kit
  • Features
  • Pricing
  • FAQ
  • About
  • Labs
  • Login
  • Get started
  1. Home
  2. Genes
  3. CBS

CBS (Cystathionine-beta-synthase)

Loading...

Summary of CBS

The CBS gene encodes an enzyme called cystathionine beta-synthase. It is responsible for using vitamin B6 to convert homocysteine and serine to a molecule called cystathionine. Another enzyme converts cystathionine to cysteine, which is used to build proteins or is broken down and excreted in urine (R).

Mutations in this gene can cause homocysteine and other potentially toxic compounds build up in the blood (R).

Also involved in the production of hydrogen sulfide, a gasotransmitter with signaling and protective effects on neurons.

It's better to have this gene increased most of the time. Exceptions: stroke , colorectal cancer
0 users want this gene increased, 0 users want it decreased

Protein names

Recommended name:

Cystathionine beta-synthase

Alternative name(s):

Beta-thionase
Serine sulfhydrase

CBS SNPs

    To see your genotype, you should be logged in and have a file with your genotype uploaded.

  1. RS1789953 (CBS) ??
  2. RS1801181 (CBS) ??
  3. RS2298758 (CBS) ??
  4. RS234706 (CBS) ??
  5. RS234709 (CBS) ??
  6. RS234714 (CBS) ??
  7. RS2851391 (CBS) ??
  8. RS4920037 (CBS) ??
  9. RS5742905 (CBS) ??
  10. RS6586282 (CBS) ??

Top Gene-Substance Interactions

CBS Interacts with These Diseases

Disease Score

Fixes

POTENTIAL Fixes

Supplementation with Taurine and Cysteine could help normalize protein levels in patients with homocystinuria [R]
For stroke patients, inhibition of CBS activity might help relieve symptoms [R]

Substances That Increase CBS

Substances Interaction Organism Category

Substances That Decrease CBS

Substances Interaction Organism Category

Advanced Summary

Enzyme important in using vitamin B6 to convert several amino acids along a pathway (serine, homocysteine) into cystathionine [R]

Homocystinuria is an autosomal recessive disease that results from many SNPs in the CBS gene, the two most common being Ile278Thr and Gly307Ser [R]

Symptoms of homocystinuria include nearsightedness, risks of blood clotting, osteoporosis, dislocation at the front of the eye of the lens, and sometimes, developmental issues [R].

People who carry one SNP for homocystinuria are more easily deficient in B12 and folic acid [R].

CBS has been found to be increased in stroke victims, increasing the amount of hydrogen sulfide in the brain, which exacerbates stroke symptoms [R]

CBS tag-SNP rs11203172 is associated with a decreased risk for early-onset preeclampsia, a pregnancy complication marked by hypertension and proteinuria (protein in the urine). Women with SNP rs1789953 have increased levels of cysteine and cystathionine [R]

Higher levels of CBS have been found in colon cancer and hydrogen sulfide which is a byproduct of CBS, has been proven to increase tumor growth and proliferation [R]

More than 150 mutations that cause homocystinuria have been identified in the CBS gene.

Conditions with Increased Gene Activity

Condition Change (log2fold) Comparison Species Experimental variables Experiment name

Conditions with Decreased Gene Activity

Condition Change (log2fold) Comparison Species Experimental variables Experiment name

Technical

The following transcription factors affect gene expression:

  • GR
  • GR-alpha
  • GR-beta
  • Arnt
  • Sp1

Tissue specificity:

In the adult strongly expressed in liver and pancreas, some expression in heart and brain, weak expression in lung and kidney. In the fetus, expressed in brain, liver and kidney.

Gene Pathways:

  • Metabolic pathways
  • Metabolism
  • Cysteine and methionine metabolism
  • Glycine, serine and threonine metabolism

Caution:

There is a duplication of the CBS gene on chromosome 21. CBS, which was originally identified as the gene encoding cystathionine beta-synthase, and CBSL (AC P12345) encode identical proteins.

Enzyme Regulation:

Allosterically activated by S-adenosyl-methionine/AdoMet. Activated by S-adenosylhomocysteine/AdoHcy (PubMed:20506325). Binds non-covalently to a heme group that may control the redox sensitivity of the enzyme (PubMed:11483494, PubMed:12173932, PubMed:22738154).

Molecular Function:

  • Carbon Monoxide Binding
  • Cystathionine Beta-Synthase Activity
  • Cysteine Synthase Activity
  • Enzyme Binding
  • Heme Binding
  • Metal Ion Binding
  • Modified Amino Acid Binding
  • Nitric Oxide Binding
  • Nitrite Reductase (No-Forming) Activity
  • Oxygen Binding
  • Protein Homodimerization Activity
  • Pyridoxal Phosphate Binding
  • S-Adenosyl-L-Methionine Binding
  • Ubiquitin Protein Ligase Binding
  • Identical Protein Binding

Biological Processes:

  • Cellular Amino Acid Biosynthetic Process
  • Cysteine Biosynthetic Process
  • Cysteine Biosynthetic Process From Serine
  • Cysteine Biosynthetic Process Via Cystathionine
  • Dna Protection
  • Homocysteine Catabolic Process
  • Homocysteine Metabolic Process
  • Hydrogen Sulfide Biosynthetic Process
  • L-Cysteine Catabolic Process
  • L-Serine Catabolic Process
  • L-Serine Metabolic Process
  • Transsulfuration

Drug Bank:

  • L-Cysteine
  • S-Adenosylmethionine
  • L-Serine
*synonyms

Synonyms/Aliases/Alternative Names of the Gene:

hypothetical protein| beta-thionase| cbs-a| cbs-b| Cbs-PA| Cbs-PB| Cbs-PC| CG1753 gene product from transcript CG1753-RA| CG1753-PA| CG1753-PB| CG1753-PC| cystathionine beta synthase| Cystathionine beta-synthase| cystathionine &bgr-synthase| cystathionine &grb;-synthase| dCBS| DmCBS| Dmel_CG1753| EGK_13203| GB12529| GW7_21324| hemoprotein H-450| HIP4| MDA_GLEAN10011753| methylcysteine synthase| N330_12300| N339_02443| PAL_GLEAN10008348| PANDA_011470| Serine sulfhydrase| TREES_T100005961| cbs

Policies

  • Terms of Service
  • Platform Consent
  • Privacy Policy
  • Disclaimer

About

  • Customer Support
  • Our Team
  • Affiliate Program

Navigation

  • Homepage
  • DNA Wellness Reports
  • Personalized Genetics Blog
  • Register your DNA Test Kit
  • Login
  • Careers
GET STARTED
  • SelfDecode is a personalized health report service, which enables users to obtain detailed information and reports based on their genome. SelfDecode does not treat, diagnose or cure any conditions, but is for informational and educational purposes alone.
SelfDecode © 2021 All Rights Reserved