1TRE

THE STRUCTURE OF TRIOSEPHOSPHATE ISOMERASE FROM ESCHERICHIA COLI DETERMINED AT 2.6 ANGSTROM RESOLUTION

Summary for 1TRE

• Entry DOI: 10.2210/pdb1tre/pdb
• Descriptor: TRIOSEPHOSPHATE ISOMERASE (2 entities in total)
• Functional Keywords: intramolecular oxidoreductase
• Biological source: Escherichia coli
• Total number of polymer chains: 2
• Total formula weight: 54005.64

Authors

Noble, M.E.M.,Wierenga, R.K. (deposition date: 1992-10-12, release date: 1993-10-31, Last modification date: 2024-02-14)

Primary citation

Noble, M.E.,Zeelen, J.P.,Wierenga, R.K.,Mainfroid, V.,Goraj, K.,Gohimont, A.C.,Martial, J.A.
Structure of triosephosphate isomerase from Escherichia coli determined at 2.6 A resolution.
Acta Crystallogr.,Sect.D, 49:403-417, 1993

PubMed Abstract: The structure of triosephosphate isomerase (TIM) from the organism Escherichia coli has been determined at a resolution of 2.6 A. The structure was solved by the molecular replacement method, first at 2.8 A resolution with a crystal grown by the technique of hanging-drop crystallization from a mother liquor containing the transition-state analogue 2-phosphoglycolate (2PG). As a search model in the molecular replacement calculations, the refined structure of TIM from Trypanosoma brucei, which has a sequence identity of 46% compared to the enzyme from E. coli, was used. An E. coli TIM crystal grown in the absence of 2PG, diffracting to 2.6 A resolution, was later obtained by application of the technique of macro-seeding using a seed crystal grown from a mother liquor without 2PG. The final 2.6 A model has a crystallographic R factor of 11.9%, and agrees well with standard stereochemical parameters. The structure of E. coli TIM suggests the importance of residues which favour helix initiation for the formation of the TIM fold. In addition, TIM from E. coli shows peculiarities in its dimer interface, and in the packing of core residues within the beta-barrel.

PubMed: 15299515
DOI: 10.1107/S0907444993002628

Experimental method

X-RAY DIFFRACTION (2.6 Å)