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Biochemical Feature of LMO2 Interactome and LMO2 Function Prospect

Wenhao Wang, Yaxin Chen, Ying Chang, Wei Sun

(School of Medicine, Nankai University, Tianjin, China (mainland))

Med Sci Monit Basic Res 2020; 26:e924421

DOI: 10.12659/MSMBR.924421


BACKGROUND: LMO2 belongs to the LIM-Only group of LIM domain protein superfamily. It is ubiquitously expressed in different types of tissues and locates either in the nucleus or in the cytoplasm depending on the tissue type. Till now the unique function of LMO2 was considered to be serving as a bridging or blocking molecule that mediates extensive protein-protein interactions. However, the exactly biological features of LMO2 interactome as well as LMO2 function spectrum remain largely unclear.
MATERIAL AND METHODS: In this study, yeast 2-hybrid assay was firstly performed using LMO2 as the bait and the characteristic of LMO2 protein interactome was analyzed according to the yeast 2-hybrid data and other relative biological information primarily using bioinformatic method.
RESULTS: Our data indicated that LMO2 favored interacting with peptides containing ß-sheet structure and having relatively unstable confirmation. Moreover, several LMO2 favored interacting domains were identified, including WD40 repeat, coiled-coil, Ankyrin repeat, Zinc finger, PDZ, and SH3, and functions of these domain-containing members were dramatically enriched in some types of cancers.
CONCLUSIONS: Our results revealed a LMO2 favored protein-interaction pattern in both secondary structure and domain level, and concentrated LMO2 function in kinds of cytoplasmic metabolism pathways as well as multiple types of cancers.

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