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- ******************************************************
- * Asparaginase / glutaminase active sites signatures *
- ******************************************************
-
- Asparaginase (EC 3.5.1.1), glutaminase (EC 3.5.1.2) and glutaminase-
- asparaginase (EC 3.5.1.38) are aminohydrolases that catalyze the hydrolysis
- of asparagine (or glutamine) to aspartate (or glutamate) and ammonia [1].
-
- Two conserved threonine residues have been shown [2,3] to play a catalytic
- role. One of them is located in the N-terminal extremity while the second is
- located at the end of the first third of the sequence. We used both
- conserved regions as signature patterns.
-
- -Consensus pattern: [LIVM]-x(2)-T-G-G-T-I-[AG]
- [The second T is an active site residue]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: some potato cathepsin D inhibitors
- and Clostridium acetobutylicum NADH-dependent butanol dehydrogenase B.
-
- -Consensus pattern: G-x-[LIVM]-x(2)-H-G-T-D-T-[LIVM]
- [The first T is an active site residue]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Note: plant asparaginases and mammalian glutaminases do not belong to this
- family and are thus not detected by the above pattern.
-
- -Expert(s) to contact by email: Gribskov M.
- gribskov@sdsc.edu
-
- -Last update: October 1993 / Patterns and text revised.
-
- [ 1] Tanaka S., Robinson E.A., Appella E., Miller M., Ammon H.L., Roberts J.,
- Weber I.T., Wlodawer A.
- J. Biol. Chem. 263:8583-8591(1988).
- [ 2] Harms E., Wehner A., Aung H.P., Rohm K.H.
- FEBS Lett. 285:55-58(1991).
- [ 3] Miller M.M., Rao J.K.M., Wlodawer A., Gribskov M.
- FEBS Lett. 328:275-279(1993).
-