7X98 image
Deposition Date 2022-03-15
Release Date 2023-03-08
Last Version Date 2023-11-29
Entry Detail
PDB ID:
7X98
Keywords:
TRANSFERASE
Title:
5-Aminolevulinate synthase HemA from Rhodopseudomonas palustris
Biological Source:
Source Organism:
Rhodopseudomonas palustris (Taxon ID: 1076)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.05 Å
R-Value Free:
0.20
R-Value Work:
0.15
R-Value Observed:
0.15
Space Group:
P 1
7X98 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:5-aminolevulinate synthase
Gene (Uniprot):hemA
Chain IDs:A, B, C, D
Chain Length:403
Number of Molecules:4
Biological Source:Rhodopseudomonas palustris
UniProt ID:M1FRN3 Pfam ID:PF00155
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
LLP A LYS modified residue
Primary Citation
Crystal structure of 5-Aminolevulinate synthase HemA from Rhodopseudomonas palustris presents multiple conformations.
Biochem.Biophys.Res.Commun. 609 100 104 (2022)
PMID: 35427926 DOI: 10.1016/j.bbrc.2022.04.021

Abstact

5-ALA is the precursor of all tetrapyrroles. 5-Aminolevulinate synthase (ALAS) catalyzes the production of 5-aminolevulinic acid (5-ALA) from glycine and succinyl-CoA. HemA from Rhodopseudomonas palustris (Rp-HemA) was reported to be a highly active ALAS. To understand the catalytic mechanism of Rp-HemA, the 2.05 Å resolution crystal structure of Rp-HemA was solved. Open, half close and close conformations were observed in the substrate-free structures. Structure comparison and sequence alignment suggest the newly observed half close conformation may also be conserved in ALAS family. The pre-existed close and half close conformations in Rp-HemA may play a key role for its high activity.

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Primary Citation of related structures
7X98