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3.4.23.4: chymosin

This is an abbreviated version!
For detailed information about chymosin, go to the full flat file.

Word Map on EC 3.4.23.4

Reaction

Broad specificity similar to that of pepsin A. Clots milk by cleavage of a single Ser-Phe105-/-Met-Ala bond in kappa-chain of casein =

Synonyms

CHY-MAX, CHY-MAX 200, chymase, chymosin, chymosin A, chymosin B, CYM, EC 3.4.4.3, More, Preprorennin, prochymosin, rCH, rennin

ECTree

     3 Hydrolases
         3.4 Acting on peptide bonds (peptidases)
             3.4.23 Aspartic endopeptidases
                3.4.23.4 chymosin

Engineering

Engineering on EC 3.4.23.4 - chymosin

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PROTEIN VARIANTS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
A115T
-
reduction of Km compared to wild-type
D304A
-
pH optima shift
D304A/T218A
G243D
-
increase of Km compared to wild-type
G244D
-
pH optima shift
Q288K
-
-
S351T
-
insertion of a glycosylation site in the linker region between chymosin and glucoamylase, strongly improves enzyme secretion
T218A
-
pH optima shift
D289M/Q298L
-
decreased hydrolytic activity
additional information