ISDA

Entry Detail

PDB ID:

7FIV

Keywords:

Title:

Crystal structure of the complex formed by Wolbachia cytoplasmic incompatibility factors CidA and CidBND1-ND2 from wPip(Tunis)

Biological Source:

Source Organism:

Wolbachia endosymbiont of Culex pipiens

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2021-08-01

Release Date:

2022-04-06

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.59 Å

R-Value Free:

0.24

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 41

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:CidA_I gamma/2 protein
Chain IDs:A
Chain Length:499
Number of Molecules:1
Biological Source:Wolbachia endosymbiont of Culex pipiens

UniProt ID:A0A2K9VS01

Protein Blast

Polymer Type:polypeptide(L)
Description:CidB_I b/2 protein
Chain IDs:B
Chain Length:769
Number of Molecules:1
Biological Source:Wolbachia endosymbiont of Culex pipiens

UniProt ID:A0A2K9VS18

Primary Citation

Crystal Structures of Wolbachia CidA and CidB Reveal Determinants of Bacteria-induced Cytoplasmic Incompatibility and Rescue.

Wang, H, Xiao, Y, Chen, X, Zhang, M, Sun, G, Wang, F, Wang, L, Zhang, H, Zhang, X, Yang, X, Li, W, Wei, Y, Yao, D, Zhang, B, Li, J, Cui, W, Wang, F, Chen, C, Shen, W, Su, D, Bai, F, Huang, J, Ye, S, Zhang, L, Ji, X, Wang, W, Wang, Z, Hochstrasser, M, Yang, H.Show

Nat Commun 13 1608 1608 (2022)

PMID: 35338130 DOI: 10.1038/s41467-022-29273-w

Abstact

Cytoplasmic incompatibility (CI) results when Wolbachia bacteria-infected male insects mate with uninfected females, leading to embryonic lethality. "Rescue" of viability occurs if the female harbors the same Wolbachia strain. CI is caused by linked pairs of Wolbachia genes called CI factors (CifA and CifB). The co-evolution of CifA-CifB pairs may account in part for the incompatibility patterns documented in insects infected with different Wolbachia strains, but the molecular mechanisms remain elusive. Here, we use X-ray crystallography and AlphaFold to analyze the CI factors from Wolbachia strain wMel called CidAwMel and CidBwMel. Substituting CidAwMel interface residues with those from CidAwPip (from strain wPip) enables the mutant protein to bind CidBwPip and rescue CidBwPip-induced yeast growth defects, supporting the importance of CifA-CifB interaction in CI rescue. Sequence divergence in CidAwPip and CidBwPip proteins affects their pairwise interactions, which may help explain the complex incompatibility patterns of mosquitoes infected with different wPip strains.

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