ISDA: 4KKV

Deposition Date 2013-05-06

Release Date 2013-05-29

Last Version Date 2023-09-20

Entry Detail

PDB ID:

4KKV

Keywords:

TRANSFERASE

Title:

Crystal structure of candida glabrata FMN adenylyltransferase D181A Mutant

Biological Source:

Source Organism:

Candida glabrata (Taxon ID: 284593)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.74 Å

R-Value Free:

0.20

R-Value Work:

0.17

R-Value Observed:

0.17

Space Group:

P 32 2 1

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Similar to uniprot|P38913 Saccharomyces cerevisiae YDL045c FAD synthetase
Gene (Uniprot):FMNAT
Mutagens:D181A
Chain IDs:A
Chain Length:308
Number of Molecules:1
Biological Source:Candida glabrata

UniProt ID:Q6FNA9 Pfam ID:PF01507 EC:2.7.1.26

Ligand Molecules

BGC

Primary Citation

The "Super Mutant" of Yeast FMN Adenylyltransferase Enhances the Enzyme Turnover Rate by Attenuating Product Inhibition.

Huerta, C, Grishin, N.V, Zhang, H.Show

Biochemistry 52 3615 3617 (2013)

PMID: 23663086 DOI: 10.1021/bi400454w

Abstact

FMN adenylyltransferase (FMNAT) is an essential enzyme catalyzing the last step of a two-step pathway converting riboflavin (vitamin B2) to FAD, the ubiquitous flavocoenzyme. A structure-based mutagenesis and steady-state kinetic analysis of yeast FMNAT unexpectedly revealed that mutant D181A had a much faster turnover rate than the wild-type enzyme. Product inhibition analysis showed that wild-type FMNAT is strongly inhibited by FAD, whereas the D181A mutant has an attenuated product inhibition. These results provide a structural basis for the product inhibition of the enzyme and suggest that product release may be the rate-limiting step of the reaction.

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Primary Citation of related structures

Abstact

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