ISDA: 1M3U

Deposition Date 2002-06-30

Release Date 2003-07-22

Last Version Date 2024-04-03

Entry Detail

PDB ID:

1M3U

Keywords:

TRANSFERASE

Title:

Crystal Structure of Ketopantoate Hydroxymethyltransferase complexed the Product Ketopantoate

Biological Source:

Source Organism:

Escherichia coli (Taxon ID: 562)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.80 Å

R-Value Free:

0.19

R-Value Work:

0.15

R-Value Observed:

0.15

Space Group:

P 1 21 1

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:3-methyl-2-oxobutanoate hydroxymethyltransferase
Gene (Uniprot):panB
Chain IDs:A, B, C, D, E, F, G, H, I, J
Chain Length:264
Number of Molecules:10
Biological Source:Escherichia coli

UniProt ID:P31057 Pfam ID:PF02548 EC:2.1.2.11

Ligand Molecules

KPL

Primary Citation

Structure of E. coli Ketopantoate Hydroxymethyl Transferase Complexed with Ketopantoate and Mg(2+), Solved by Locating 160 Selenomethionine Sites.

von Delft, F, Inoue, T, Saldanha, S.A, Ottenhof, H.H, Schmitzberger, F, Birch, L.M, Dhanaraj, V, Witty, M, Smith, A.G, Blundell, T.L, Abell, C, Teller, J.H, Powers, S.G, Snell, E.E, Powers, S.G, Snell, E.E, Jones, C.E, Brook, J.M, Buck, D, Abell, C, Smith, A.G.Show

Structure 11 985 996 (2003)

PMID: 12906829 DOI: 10.1016/S0969-2126(03)00158-8

Abstact

We report the crystal structure of E. coli ketopantoate hydroxymethyltransferase (KPHMT) at 1.9 A resolution, in complex with its product, ketopantoate. KPHMT catalyzes the first step in the biosynthesis of pantothenate (vitamin B(5)), the precursor of coenzyme A and the acyl carrier protein cofactor. The structure of the decameric enzyme was solved by multiwavelength anomalous dispersion to locate 160 selenomethionine sites and phase 560 kDa of protein, making it the largest structure solved by this approach. KPHMT adopts the (betaalpha)(8) barrel fold and is a member of the phosphoenolpyruvate/pyruvate superfamily. The active site contains a ketopantoate bidentately coordinated to Mg(2+). Similar binding is likely for the substrate, alpha-ketoisovalerate, orienting the C3 for deprotonation.

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Primary Citation of related structures

Abstact

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