7DSR image
Deposition Date 2020-12-31
Release Date 2021-03-17
Last Version Date 2023-11-29
Entry Detail
PDB ID:
7DSR
Keywords:
Title:
Anthranilate phosphoribosyltransferase variant Gly141Asn from Saccharomyces cerevisiae in complex with 4-fluoroanthranilate
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.50 Å
R-Value Free:
0.26
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Anthranilate phosphoribosyltransferase
Gene (Uniprot):TRP4
Mutations:G141A
Chain IDs:A, B
Chain Length:383
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae S288C
Ligand Molecules
Primary Citation
Crystal structures of anthranilate phosphoribosyltransferase from Saccharomyces cerevisiae.
Acta Crystallogr.,Sect.F 77 61 69 (2021)
PMID: 33682790 DOI: 10.1107/S2053230X21001989

Abstact

Anthranilate phosphoribosyltransferase (AnPRT) catalyzes the transfer of the phosphoribosyl group of 5'-phosphoribosyl-1'-pyrophosphate (PRPP) to anthranilate to form phosphoribosyl-anthranilate. Crystal structures of AnPRTs from bacteria and archaea have previously been determined; however, the structure of Saccharomyces cerevisiae AnPRT (ScAnPRT) still remains unsolved. Here, crystal structures of ScAnPRT in the apo form as well as in complex with its substrate PRPP and the substrate analogue 4-fluoroanthranilate (4FA) are presented. These structures demonstrate that ScAnPRT exhibits the conserved structural fold of type III phosphoribosyltransferase enzymes and shares the similar mode of substrate binding found across the AnPRT protein family. In addition, crystal structures of ScAnPRT mutants (ScAnPRTSer121Ala and ScAnPRTGly141Asn) were also determined. These structures suggested that the conserved residue Ser121 is critical for binding PRPP, while Gly141 is dispensable for binding 4FA. In summary, these structures improved the preliminary understanding of the substrate-binding mode of ScAnPRT and laid foundations for future research.

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Primary Citation of related structures