PMID- 11909869
OWN - NLM
STAT- MEDLINE
DCOM- 20020702
LR  - 20071114
IS  - 0021-9258 (Print)
IS  - 0021-9258 (Linking)
VI  - 277
IP  - 22
DP  - 2002 May 31
TI  - Species-specific inhibition of porphobilinogen synthase by 4-oxosebacic acid.
PG  - 19792-9
AB  - Porphobilinogen synthase (PBGS) catalyzes the condensation of two molecules of
      5-aminolevulinic acid (ALA), an essential step in tetrapyrrole biosynthesis.
      4-Oxosebacic acid (4-OSA) and 4,7-dioxosebacic acid (4,7-DOSA) are bisubstrate
      reaction intermediate analogs for PBGS. We show that 4-OSA is an active
      site-directed irreversible inhibitor for Escherichia coli PBGS, whereas human,
      pea, Pseudomonas aeruginosa, and Bradyrhizobium japonicum PBGS are insensitive to
      inhibition by 4-OSA. Some variants of human PBGS (engineered to resemble E. coli 
      PBGS) have increased sensitivity to inactivation by 4-OSA, suggesting a
      structural basis for the specificity. The specificity of 4-OSA as a PBGS
      inhibitor is significantly narrower than that of 4,7-DOSA. Comparison of the
      crystal structures for E. coli PBGS inactivated by 4-OSA versus 4,7-DOSA shows
      significant variation in the half of the inhibitor that mimics the second
      substrate molecule (A-side ALA). Compensatory changes occur in the structure of
      the active site lid, which suggests that similar changes normally occur to
      accommodate numerous hybridization changes that must occur at C3 of A-side ALA
      during the PBGS-catalyzed reaction. A comparison of these with other PBGS
      structures identifies highly conserved active site water molecules, which are
      isolated from bulk solvent and implicated as proton acceptors in the
      PBGS-catalyzed reaction.
FAU - Jaffe, Eileen K
AU  - Jaffe EK
AD  - Institute for Cancer Research, Fox Chase Cancer Center, Philadelphia,
      Pennsylvania 19111, USA. EK_Jaffe@fccc.edu
FAU - Kervinen, Jukka
AU  - Kervinen J
FAU - Martins, Jacob
AU  - Martins J
FAU - Stauffer, Frederic
AU  - Stauffer F
FAU - Neier, Reinhard
AU  - Neier R
FAU - Wlodawer, Alexander
AU  - Wlodawer A
FAU - Zdanov, Alexander
AU  - Zdanov A
LA  - eng
SI  - PDB/1L6S
SI  - PDB/1L6Y
GR  - CA06927/CA/NCI NIH HHS/United States
GR  - ES03654/ES/NIEHS NIH HHS/United States
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, P.H.S.
DEP - 20020321
PL  - United States
TA  - J Biol Chem
JT  - The Journal of biological chemistry
JID - 2985121R
RN  - 0 (4-oxosebacic acid)
RN  - 0 (Decanoic Acids)
RN  - 0 (Enzyme Inhibitors)
RN  - EC 4.2.1.24 (Porphobilinogen Synthase)
SB  - IM
MH  - Amino Acid Sequence
MH  - Binding Sites
MH  - Catalysis
MH  - Crystallography, X-Ray
MH  - Decanoic Acids/*pharmacology
MH  - Dose-Response Relationship, Drug
MH  - Electrons
MH  - Enzyme Inhibitors/*pharmacology
MH  - Escherichia coli/enzymology/metabolism
MH  - Humans
MH  - Kinetics
MH  - Models, Chemical
MH  - Models, Molecular
MH  - Molecular Sequence Data
MH  - Peas/enzymology
MH  - Porphobilinogen Synthase/*antagonists & inhibitors
MH  - Protein Binding
EDAT- 2002/03/23 10:00
MHDA- 2002/07/03 10:01
CRDT- 2002/03/23 10:00
PHST- 2002/03/23 10:00 [pubmed]
PHST- 2002/07/03 10:01 [medline]
PHST- 2002/03/23 10:00 [entrez]
AID - 10.1074/jbc.M201486200 [doi]
AID - M201486200 [pii]
PST - ppublish
SO  - J Biol Chem. 2002 May 31;277(22):19792-9. doi: 10.1074/jbc.M201486200. Epub 2002 
      Mar 21.