7YKN

Crystal structure of (6-4) photolyase from Vibrio cholerae

PDB DOI: https://doi.org/10.2210/pdb7YKN/pdb

Classification: LYASE
Organism(s): Vibrio cholerae
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2022-07-23 Released: 2022-12-21
Deposition Author(s): Cakilkaya, B., Kavakli, I.H., DeMirci, H.
Funding Organization(s): Other government

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.50 Å
R-Value Free: 0.283
R-Value Work: 0.225
R-Value Observed: 0.227

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.2 of the entry. See complete history.

Literature

The crystal structure of Vibrio cholerae (6-4) photolyase reveals interactions with cofactors and a DNA-binding region.

Cakilkaya, B., Kavakli, I.H., DeMirci, H.

(2023) J Biol Chem 299: 102794-102794

PubMed: 36528063 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1016/j.jbc.2022.102794
Primary Citation of Related Structures:
7YKN

PubMed Abstract:
Photolyases (PLs) reverse UV-induced DNA damage using blue light as an energy source. Of these PLs, (6-4) PLs repair (6-4)-lesioned photoproducts. We recently identified a gene from Vibrio cholerae (Vc) encoding a (6-4) PL, but structural characterization is needed to elucidate specific interactions with the chromophore cofactors. Here, we determined the crystal structure of Vc (6-4) PL at 2.5 Å resolution. Our high-resolution structure revealed that the two well-known cofactors, flavin adenine dinucleotide and the photoantenna 6,7-dimethyl 8-ribityl-lumazin (DMRL), stably interact with an α-helical and an α/β domain, respectively. Additionally, the structure has a third cofactor with distinct electron clouds corresponding to a [4Fe-4S] cluster. Moreover, we identified that Asp106 makes a hydrogen bond with water and DMRL, which indicates further stabilization of the photoantenna DMRL within Vc (6-4) PL. Further analysis of the Vc (6-4) PL structure revealed a possible region responsible for DNA binding. The region located between residues 478 to 484 may bind the lesioned DNA, with Arg483 potentially forming a salt bridge with DNA to stabilize further the interaction of Vc (6-4) PL with its substrate. Our comparative analysis revealed that the DNA lesion could not bind to the Vc (6-4) PL in a similar fashion to the Drosophila melanogaster (Dm, (6-4)) PL without a significant conformational change of the protein. The 23rd helix of the bacterial (6-4) PLs seems to have remarkable plasticity, and conformational changes facilitate DNA binding. In conclusion, our structure provides further insight into DNA repair by a (6-4) PL containing three cofactors.

Organizational Affiliation

Department of Molecular Biology and Genetics, Koc University, Istanbul, Turkey.

Macromolecule Content

Total Structure Weight: 63.39 kDa
Atom Count: 4,778
Modelled Residue Count: 507
Deposited Residue Count: 536
Unique protein chains: 1

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cryptochrome/photolyase family protein	A	536	Vibrio cholerae	Mutation(s): 0 Gene Names: D6U24_03430, ERS013165_01011, ERS013186_03677, ERS013198_00016, ERS013199_00375, ERS013202_01140, ERS013207_00426
UniProt
Find proteins for A0A2V4NVF4 (Vibrio cholerae) Explore A0A2V4NVF4 Go to UniProtKB: A0A2V4NVF4
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	A0A2V4NVF4
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
FAD (Subject of Investigation/LOI) Query on FAD Download Ideal Coordinates CCD File SDF format, chain E [auth A] MOL2 format, chain E [auth A] mmCIF format, chain E [auth A]	E [auth A]	FLAVIN-ADENINE DINUCLEOTIDE C₂₇ H₃₃ N₉ O₁₅ P₂ VWWQXMAJTJZDQX-UYBVJOGSSA-N		Interactions Focus chain E [auth A] Interactions & Density Focus chain E [auth A]
SF4 (Subject of Investigation/LOI) Query on SF4 Download Ideal Coordinates CCD File SDF format, chain G [auth A] MOL2 format, chain G [auth A] mmCIF format, chain G [auth A]	G [auth A]	IRON/SULFUR CLUSTER Fe₄ S₄ LJBDFODJNLIPKO-UHFFFAOYSA-N		Interactions Focus chain G [auth A] Interactions & Density Focus chain G [auth A]
DLZ (Subject of Investigation/LOI) Query on DLZ Download Ideal Coordinates CCD File SDF format, chain D [auth A] MOL2 format, chain D [auth A] mmCIF format, chain D [auth A]	D [auth A]	1-deoxy-1-(6,7-dimethyl-2,4-dioxo-3,4-dihydropteridin-8(2H)-yl)-D-ribitol C₁₃ H₁₈ N₄ O₆ SXDXRJZUAJBNFL-XKSSXDPKSA-N		Interactions Focus chain D [auth A] Interactions & Density Focus chain D [auth A]
GOL Query on GOL Download Ideal Coordinates CCD File SDF format, chain B [auth A] SDF format, chain C [auth A] MOL2 format, chain B [auth A] MOL2 format, chain C [auth A] mmCIF format, chain B [auth A] mmCIF format, chain C [auth A]	B [auth A], C [auth A]	GLYCEROL C₃ H₈ O₃ PEDCQBHIVMGVHV-UHFFFAOYSA-N		Interactions Focus chain B [auth A] Focus chain C [auth A] Interactions & Density Focus chain B [auth A] Focus chain C [auth A]
IMD Query on IMD Download Ideal Coordinates CCD File SDF format, chain F [auth A] MOL2 format, chain F [auth A] mmCIF format, chain F [auth A]	F [auth A]	IMIDAZOLE C₃ H₅ N₂ RAXXELZNTBOGNW-UHFFFAOYSA-O		Interactions Focus chain F [auth A] Interactions & Density Focus chain F [auth A]