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Title: Structural basis underlying CAC RNA recognition by the RRM domain of dimeric RNA-binding protein RBPMS

Journal Article · · Quarterly Reviews of Biophysics
 [1];  [2];  [2];  [1]
  1. Memorial Sloan-Kettering Cancer Center, New York, NY (United States)
  2. The Rockefeller Univ., New York, NY (United States)

RNA-binding protein with multiple splicing (designated RBPMS) is a higher vertebrate mRNA-binding protein containing a single RNA recognition motif (RRM). RBPMS has been shown to be involved in mRNA transport, localization and stability, with key roles in axon guidance, smooth muscle plasticity, as well as regulation of cancer cell proliferation and migration. We report on structure-function studies of the RRM domain of RBPMS bound to a CAC-containing single-stranded RNA. These results provide insights into potential topologies of complexes formed by the RBPMS RRM domain and the tandem CAC repeat binding sites as detected by photoactivatable-ribonucleoside-enhanced crosslinking and immunoprecipitation. These studies establish that the RRM domain of RBPMS forms a symmetrical dimer in the free state, with each monomer binding sequence-specifically to all three nucleotides of a CAC segment in the RNA bound state. Structure-guided mutations within the dimerization and RNA-binding interfaces of RBPMS RRM on RNA complex formation resulted in both disruption of dimerization and a decrease in RNA-binding affinity as observed by size exclusion chromatography and isothermal titration calorimetry. Here, as anticipated from biochemical binding studies, over-expression of dimerization or RNA-binding mutants of Flag-HA-tagged RBPMS were no longer able to track with stress granules in HEK293 cells, thereby documenting the deleterious effects of such mutations in vivo.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Institutes of Health (NIH); RU CCTS
Grant/Contract Number:
R01GM104962; UL1RR024143
OSTI ID:
1430282
Journal Information:
Quarterly Reviews of Biophysics, Vol. 49, Issue 2016; ISSN 0033-5835
Publisher:
Cambridge University PressCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Cited By (11)

Exploring the Activities of RBPMS Proteins in Myocardial Biology journal August 2019
Accuracy and precision of protein structures determined by magic angle spinning NMR spectroscopy: for some ‘with a little help from a friend’ journal March 2019
Molecular basis for AU-rich element recognition and dimerization by the HuR C-terminal RRM journal February 2019
Exploring the molecular basis of RNA recognition by the dimeric RNA-binding protein via molecular simulation methods journal September 2016
Identification of RBPMS as a smooth muscle master splicing regulator via proximity of its gene with super-enhancers journal March 2019
Expanding the spectrum of pediatric NTRK ‐rearranged fibroblastic tumors to the central nervous system: A case report with RBPMS‐NTRK3 fusion journal September 2018
rbpms2 functions in Balbiani body architecture and ovary fate journal July 2018
Identification of RBPMS as a mammalian smooth muscle master splicing regulator via proximity of its gene with super-enhancers journal July 2019
Crystal structure of human Acinus RNA recognition motif domain journal January 2018
Identification of RBPMS as a mammalian smooth muscle master splicing regulator via proximity of its gene with super-enhancers. text January 2019
Molecular basis for AU-rich element recognition and dimerization by the HuR C-terminal RRM text January 2019