Complete Genome Sequence of
            <i>Spirosoma</i>
            sp. Strain KCTC 42546, Isolated from a Reservoir in South Korea

Background: Leucine-rich repeats (LRRs) occurring in tandem are 20 ⎼ 29 amino acids long. Eleven LRR types have been recognized; they include plant-specific (PS) type with the consensus of LxxLxLxxNxL SGxIPxxIxxLxx of 24 residues and SDS22-like type with the consensus of LxxLxLxxNxL xxIxxIxxLxx of 22 residues. Objective: A viral LRR protein in metagenome data indicated that most of the LRRs (5/6 = 0.83) are represented by the consensus of LxxLDLxxTxV SGKLSDLxxLTN of 23 residues. This LRR shows a dual characteristic of PS and SDS22-like LRRs (called PS/SDS22-like LRR). A comprehensive similarity search was performed under the hypothesis that many proteins contain LRR domains consisting of only or mainly PS/SDS22-like LRR. Methods: Sequence similarity search by the FASTA and BLAST programs was performed using the sequence of this PS/SDS22-like LRR domain as a query sequence. The presence of PS/SDS22-like LRR was screened within the LRR domains in known structures. Results: Over 280 LRR proteins were identified from protists, fungi, and bacteria; ~ 40% come from the SAR group (the phyla Alveolate and Stramenopiles). The secondary structure analysis of PS/SDS22-like LRRs occurring sporadically in the known structures indicates three or four type patterns of secondary structures. Conclusion: PS/SDS22-like LRR forms an LRR class with PS, SDS22-like and Leptospira-like LRRs. It appears that PS/SDS22-like LRR is a chameleon-like sequence. A duality of two LRR types brings diversity.

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A Dual Leucine-rich Repeat in Proteins from the Eukaryotic SAR Group

Matsushima

Batkhishig

Enkhbayar

et al. 2023

PPL

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Complete Genome Sequence of Spirosoma sp. Strain KCTC 42546, Isolated from a Reservoir in South Korea

Abstract: This study reports on the complete genome sequence of Spirosoma sp. strain KCTC 42546, isolated from fresh water in a reservoir in South Korea. The genome contained genes for various glycosyl hydrolases, which are associated with degrading sugars and DNA-repairing enzymes.

Cited by 1 publication

References 10 publications

A Dual Leucine-rich Repeat in Proteins from the Eukaryotic SAR Group

A Dual Leucine-rich Repeat in Proteins from the Eukaryotic SAR Group

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