Structural analysis of LabB from Klebsiella pneumoniae reveals an alternative dimeric conformation generated by the sliding of TPR motifs

  • Jung, Kyoung Ho
  • Lee, So Yeon
  • Park, So Eun
  • Kang, Young Woo
  • Park, Hyun Ho
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초록

LabB (YciM) is a key regulator of lipopolysaccharide (LPS) biosynthesis in Gram-negative bacteria, modulating LpxC degradation to maintain outer membrane integrity. While E. coli LabB (ecLabB) forms a closed-ring dimer via TPR motifs, the crystal structure of Klebsiella pneumoniae LabB (kpLabB) reveals a distinct open-ring dimeric architecture, generated by TPR motif sliding. This alternative conformation suggests a potential mechanism for dynamic regulation and partner interactions.

키워드

Crystal structureKlebsiella pneumoniaeLPS synthesisLabBSuperbugsLIPOPOLYSACCHARIDELAPB
제목
Structural analysis of LabB from Klebsiella pneumoniae reveals an alternative dimeric conformation generated by the sliding of TPR motifs
저자
Jung, Kyoung HoLee, So YeonPark, So EunKang, Young WooPark, Hyun Ho
DOI
10.1016/j.bbrc.2025.152151
발행일
2025-08
유형
Article
저널명
Biochemical and Biophysical Research Communications
775