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- *********************************
- * Phosphoribulokinase signature *
- *********************************
-
- Phosphoribulokinase (EC 2.7.1.19) (PRK) [1,2] is one of the enzymes specific
- to the Calvin's reductive pentose phosphate cycle which is the major route by
- which carbon dioxide is assimilated and reduced by autotrophic organisms. PRK
- catalyzes the ATP-dependent phosphorylation of ribulose 5-phosphate into
- ribulose 1,5-bisphosphate which is the substrate for RubisCO.
-
- PRK's of diverse origins show different properties with respect to the size of
- the protein, the subunit structure, or the enzymatic regulation. However an
- alignment of the sequences of PRK from plants, algae, photosynthetic and
- chemoautotrophic bacteria shows that there are a few regions of sequence
- similarity. As a signature pattern we have selected one of these regions.
-
- -Consensus pattern: K-[LIVM]-x-R-D-x(3)-R-G-x-[ST]-x-E
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: December 1991 / First entry.
-
- [ 1] Kossmann J., Klintworth R., Bowien B.
- Gene 85:247-252(1989).
- [ 2] Gibson J.L., Chen J.-H., Tower P.A., Tabita F.R.
- Biochemistry 29:8085-8093(1990).
-