PMID- 10968789 OWN - NLM STAT- MEDLINE DCOM- 20000914 LR - 20131121 IS - 0036-8075 (Print) IS - 0036-8075 (Linking) VI - 289 IP - 5484 DP - 2000 Sep 1 TI - Structural evidence for evolution of the beta/alpha barrel scaffold by gene duplication and fusion. PG - 1546-50 AB - The atomic structures of two proteins in the histidine biosynthesis pathway consist of beta/alpha barrels with a twofold repeat pattern. It is likely that these proteins evolved by twofold gene duplication and gene fusion from a common half-barrel ancestor. These ancestral domains are not visible as independent domains in the extant proteins but can be inferred from a combination of sequence and structural analysis. The detection of subdomain structures may be useful in efforts to search genome sequences for functionally and structurally related proteins. FAU - Lang, D AU - Lang D AD - European Molecular Biology Laboratory (EMBL) Hamburg Outstation, EMBL c/o Deutsches Elektronen- Synchrotron (DESY), Notkestrasse 85, D-22603 Hamburg, Germany. FAU - Thoma, R AU - Thoma R FAU - Henn-Sax, M AU - Henn-Sax M FAU - Sterner, R AU - Sterner R FAU - Wilmanns, M AU - Wilmanns M LA - eng SI - PDB/1QO2 SI - PDB/1THF PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Science JT - Science (New York, N.Y.) JID - 0404511 RN - 4QD397987E (Histidine) RN - EC 3.5.1.- (imidazole glycerol phosphate synthase) RN - EC 3.5.4.- (Aminohydrolases) RN - EC 5.3.1.- (Aldose-Ketose Isomerases) RN - EC 5.3.1.16 (Phosphoribosyl-5-amino-1-phosphoribosyl-4-imidazolecarboxiamide isomerase) SB - IM SB - S CIN - Science. 2000 Sep 1;289(5484):1490. PMID: 10991737 MH - Aldose-Ketose Isomerases/*chemistry/genetics/metabolism MH - Amino Acid Motifs MH - Amino Acid Sequence MH - Aminohydrolases/*chemistry/genetics/metabolism MH - Binding Sites MH - Catalysis MH - Crystallography, X-Ray MH - *Evolution, Molecular MH - *Gene Duplication MH - Histidine/biosynthesis MH - Models, Molecular MH - Molecular Sequence Data MH - Protein Folding MH - *Protein Structure, Tertiary MH - *Recombination, Genetic MH - Sequence Alignment MH - Thermotoga maritima/enzymology EDAT- 2000/09/01 11:00 MHDA- 2000/09/19 11:01 CRDT- 2000/09/01 11:00 PHST- 2000/09/01 11:00 [pubmed] PHST- 2000/09/19 11:01 [medline] PHST- 2000/09/01 11:00 [entrez] AID - 8764 [pii] PST - ppublish SO - Science. 2000 Sep 1;289(5484):1546-50.