8YK7

Structure of Rib domain from surface adhesin of Limosilactobacillus reuteri

Summary for 8YK7

• Entry DOI: 10.2210/pdb8yk7/pdb
• Descriptor: YSIRK signal domain/LPXTG anchor domain surface protein, COPPER (II) ION, SODIUM ION, ... (5 entities in total)
• Functional Keywords: cell surface protein, bacterial adhesin, rib domain, ig-like domain, tandem-repeat domain, structural protein
• Biological source: Limosilactobacillus reuteri
• Total number of polymer chains: 1
• Total formula weight: 8800.50

Authors

Xue, Y.,Kang, X. (deposition date: 2024-03-04, release date: 2024-09-11, Last modification date: 2024-09-18)

Primary citation

Xue, Y.,Wu, Z.,Kang, X.
Crystal structure of the Rib domain of the cell-wall-anchored surface protein from Limosilactobacillus reuteri.
Acta Crystallogr.,Sect.F, 80:228-233, 2024

PubMed Abstract: The immunoglobulin (Ig)-like domain is found in a broad range of proteins with diverse functional roles. While an essential β-sandwich fold is maintained, considerable structural variations exist and are critical for functional diversity. The Rib-domain family, primarily found as tandem-repeat modules in the surface proteins of Gram-positive bacteria, represents another significant structural variant of the Ig-like fold. However, limited structural and functional exploration of this family has been conducted, which significantly restricts the understanding of its evolution and significance within the Ig superclass. In this work, a high-resolution crystal structure of a Rib domain derived from the probiotic bacterium Limosilactobacillus reuteri is presented. This protein, while sharing significant structural similarity with homologous domains from other bacteria, exhibits a significantly increased thermal resistance. The potential structural features contributing to this stability are discussed. Moreover, the presence of two copper-binding sites, with one positioned on the interface, suggests potential functional roles that warrant further investigation.

PubMed: 39196706
DOI: 10.1107/S2053230X24007970

Experimental method

X-RAY DIFFRACTION (1.35 Å)