title: Lsm proteins and Hfq: Life at the 3' end.
abstract: The bacterial Hfq protein is a versatile modulator of RNA function and is particularly important for regulation mediated by small non-coding RNAs. Hfq is a bacterial Sm protein but bears more similarity to the eukaryotic Sm-like (Lsm) family of proteins than the prototypical Sm proteins. Hfq and Lsm proteins share the ability to chaperone RNA-RNA and RNA/protein interactions and an interesting penchant for protecting the 3' end of a transcript from exonucleolytic decay while encouraging degradation through other pathways. Our view of Lsm function in eukaryotes has historically been informed by studies of Hfq structure and function but mutational analyses and structural studies of Lsm sub-complexes have given important insights as well. Here, we aim to compare and contrast the roles of these evolutionarily related complexes and to highlight areas for future investigation.
authors: Department of Microbiology, Immunology & Pathology, Colorado State University, Fort Collins, CO, USA. cwilusz@colostate.edu
authors: Carol J
authors: CJ
authors: Wilusz
authors: Jeffrey
authors: J
authors: Wilusz
mesh_terms: D000818:Animals; D001426:Bacterial Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D029968:Escherichia coli Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D056890:Eukaryota / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D035001:Host Factor 1 Protein / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D006801:Humans; D010802:Phylogeny; D026723:Polyadenylation; D011518:Proto-Oncogene Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D020871:RNA Stability; D058727:RNA, Small Untranslated / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D016601:RNA-Binding Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D016415:Sequence Alignment
chemical_list: D001426:Bacterial Proteins; D029968:Escherichia coli Proteins; D035001:Host Factor 1 Protein; C464824:LSM1 protein, human; D011518:Proto-Oncogene Proteins; D058727:RNA, Small Untranslated; D016601:RNA-Binding Proteins; D029701:Saccharomyces cerevisiae Proteins
keywords: RNA chaperone; Sm-like; exoribonuclease; mRNA decay; oligouridylation; polyadenylation; splicing
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