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4.2.1.22: cystathionine beta-synthase

This is an abbreviated version!
For detailed information about cystathionine beta-synthase, go to the full flat file.

Word Map on EC 4.2.1.22

Reaction

L-serine
+
L-homocysteine
=
L-cystathionine
 +
H2O

Synonyms

Beta-thionase, CBS, CBS424, CDCP2, CNNM2, Cys4, CysB, cystathionine beta synthase, cystathionine beta-synthase, cystathionine beta-synthase domain-containing protein, cystathionine-beta-synthase, Cysteine synthase, EC 4.2.1.21, hCBS, Hemoprotein H-450, LbrM.17.0230, Methylcysteine synthase, osmoprotectant transporter OpuC, PF1953, PH0267, Serine sulfhydrase, Serine sulfhydrylase, Serine sulphhydrase, TA0289, TM0935, TV1335, yCBS, ytCBS

ECTree

     4 Lyases
         4.2 Carbon-oxygen lyases
             4.2.1 Hydro-lyases
                4.2.1.22 cystathionine beta-synthase

General Stability

General Stability on EC 4.2.1.22 - cystathionine beta-synthase

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GENERAL STABILITY
ORGANISM
UNIPROT
LITERATURE
2-mercaptoethanol stabilizes
binding of S-adenosyl-L-methionine stabilizes cystathionine beta-synthase against degradation. Under pathological conditions with reduced levels of S-adenosyl-L-methionine (human hepatocellular carcinoma), level of cystathionine beta-synthase is diminished. This decrease in cystathionine beta-synthase level correlates with reduced glutathione that is, in turn, associated with increased vulnerability to oxidative stress. Posttranslational regulation of cystathionine beta-synthase stability by S-adenosyl-L-methionine provides a mechanism for achieving coordinate changes in cellular methylation and antioxidant status that is observed in a number of disease states
-
binding of S-adenosyl-L-methionine stabilizes cystathionine beta-synthase against degradation. Under pathological conditions with reduced levels of S-adenosyl-L-methionine (mouse model for chronic steatohepatitis), level of cystathionine beta-synthase is diminished. This decrease in cystathionine beta-synthase level correlates with reduced glutathione that is, in turn, associated with increased vulnerability to oxidative stress. Posttranslational regulation of cystathionine beta-synthase stability by S-adenosyl-L-methionine provides a mechanism for achieving coordinate changes in cellular methylation and antioxidant status that is observed in a number of disease states
-
high protein concentration stabilizes
in the presence of 200 mM NaCl the kinetic stability of the regulatory domains is increased about 300fold while the stability of catalytic domains decreases about 5fold
inactivation by aging
-
lyophilization inactivates