L-cysteine biosynthesis III (from L-homocysteine)

Stipanuk MH. Sulfur amino acid metabolism: pathways for production and removal of homocysteine and cysteine. Annu Rev Nutr. 2004;24():539–77. doi: 10.1146/annurev.nutr.24.012003.132418. PMID: 15189131.; Finkelstein JD. Methionine metabolism in mammals. The Journal of Nutritional Biochemistry. 1990 May;1(5):228–37. doi: 10.1016/0955-2863(90)90070-2.

Metabolites

Cadmium

Formula: Cd (113.903361)

CAS ID: 7440-43-9

Copper

Formula: Cu (62.929599)

CAS ID: 7440-50-8

H+

Formula: H (1.0078246)

CAS ID: 12408-02-5

H2O

Formula: H2O (18.0105642)

CAS ID: 7732-18-5

Hydroxylamine

Formula: NH3O (33.0214628)

CAS ID: 7803-49-8

Mercury(2+)

Formula: Hg (201.970632)

CAS ID: 14302-87-5

N-Ethylmaleimide

Formula: C6H7NO2 (125.0476762)

CAS ID: 128-53-0

2-oxobutanoate

Formula: C4H5O3 (101.02386800000001)

CAS ID:

pyridoxal 5'-phosphate(2-)

Formula: C8H8NO6P (245.0089238)

CAS ID:

o-Iodosobenzoate

Formula: C7H4IO3- (262.9205204)

CAS ID:



Enzyme

EC Number name full name note
4.2.1.22 cystathionine beta-synthase L-serine hydro-lyase (adding homocysteine; L-cystathionine-forming)
4.4.1.1 cystathionine gamma-lyase L-cystathionine cysteine-lyase (deaminating; 2-oxobutanoate-forming)
4.4.1.2 homocysteine desulfhydrase L-homocysteine hydrogen-sulfide-lyase (deaminating; 2-oxobutanoate-forming)


Proteins

Protein ID name full name