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- *********************************************
- * Uroporphyrinogen decarboxylase signatures *
- *********************************************
-
- Uroporphyrinogen decarboxylase (EC 4.1.1.37) (URO-D), the fifth enzyme of the
- heme biosynthetic pathway, catalyzes the sequential decarboxylation of the
- four acetyl side chains of uroporphyrinogen to yield coproporphyrinogen [1].
-
- URO-D deficiency is responsible for the Human genetic diseases familial
- porphyria cutanea tarda (fPCT) and hepatoerythropoietic porphyria (HEP).
-
- The sequence of URO-D has been well conserved throughout evolution. The best
- conserved region is located in the N-terminal section; it contains a perfectly
- conserved hexapeptide. There are two arginine residues in this hexapeptide
- which could be involved in the binding, via salt bridges, to the carboxyl
- groups of the propionate side chains of the substrate. We used this region as
- a signature pattern. A second signature pattern is based on a another well
- conserved region which is located in the central section of the protein.
-
- -Consensus pattern: P-x-W-x-M-R-Q-A-G-R
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: G-F-[STAGC](3)-P-[FYW]-T-L-x(2)-Y-x(2)-E-G
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: October 1993 / First entry.
-
- [ 1] Garey J.R., Labbe-Bois R., Chelstowska A., Rytka J., Harrison L.,
- Kushner J., Labbe P.
- Eur. J. Biochem. 205:1011-1016(1992).
-