Structure of the second RRM domain of Nrd1, a fission yeast MAPK target RNA binding protein, and implication for its RNA recognition and regulation

2013 ◽  
Vol 437 (1) ◽  
pp. 12-17 ◽  
Author(s):  
Ayaho Kobayashi ◽  
Teppei Kanaba ◽  
Ryosuke Satoh ◽  
Toshinobu Fujiwara ◽  
Yutaka Ito ◽  
...  
Author(s):  
Marianna Teplova ◽  
Thalia A. Farazi ◽  
Thomas Tuschl ◽  
Dinshaw J. Patel

AbstractRNA-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. 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.


2017 ◽  
Vol 11 (2) ◽  
pp. 123-126 ◽  
Author(s):  
Ayaho Kobayashi ◽  
Teppei Kanaba ◽  
Ryosuke Satoh ◽  
Yutaka Ito ◽  
Reiko Sugiura ◽  
...  

2013 ◽  
Vol 53 (supplement1-2) ◽  
pp. S106
Author(s):  
Ayaho Kobayashi ◽  
Ryosuke Satoh ◽  
Toshinobu Fujiwara ◽  
Reiko Sugiura ◽  
Yutaka Ito ◽  
...  

Gene ◽  
1997 ◽  
Vol 186 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Yasuyuki Kurihara ◽  
Takashi Nagata ◽  
Takao Imai ◽  
Ado Hiwatashi ◽  
Masataka Horiuchi ◽  
...  

Author(s):  
Masashi Yukawa ◽  
Mitsuki Ohishi ◽  
Yusuke Yamada ◽  
Takashi Toda

Cells form a bipolar spindle during mitosis to ensure accurate chromosome segregation. Proper spindle architecture is established by a set of kinesin motors and microtubule-associated proteins. In most eukaryotes, kinesin-5 motors are essential for this process, and genetic or chemical inhibition of their activity leads to the emergence of monopolar spindles and cell death. However, these deficiencies can be rescued by simultaneous inactivation of kinesin-14 motors, as they counteract kinesin-5. We conducted detailed genetic analyses in fission yeast to understand the mechanisms driving spindle assembly in the absence of kinesin-5. Here we show that deletion of the nrp1 gene, which encodes a putative RNA-binding protein with unknown function, can rescue temperature sensitivity caused by cut7-22, a fission yeast kinesin-5 mutant. Interestingly, kinesin-14/Klp2 levels on the spindles in the cut7 mutants were significantly reduced by the nrp1 deletion, although the total levels of Klp2 and the stability of spindle microtubules remained unaffected. Moreover, RNA-binding motifs of Nrp1 are essential for its cytoplasmic localization and function. We have also found that a portion of Nrp1 is spatially and functionally sequestered by chaperone-based protein aggregates upon mild heat stress and limits cell division at high temperatures. We propose that Nrp1 might be involved in post-transcriptional regulation through its RNA-binding ability to promote the loading of Klp2 on the spindle microtubules.


FEBS Journal ◽  
2021 ◽  
Author(s):  
Sayantani Roy ◽  
Soumendu Boral ◽  
Snigdha Maiti ◽  
Tushar Kushwaha ◽  
Aditya J. Basak ◽  
...  

1993 ◽  
Vol 13 (6) ◽  
pp. 3494-3504 ◽  
Author(s):  
T D Levine ◽  
F Gao ◽  
P H King ◽  
L G Andrews ◽  
J D Keene

We have investigated the RNA binding specificity of Hel-N1, a human neuron-specific RNA-binding protein, which contains three RNA recognition motifs. Hel-N1 is a human homolog of Drosophila melanogaster elav, which plays a vital role in the development of neurons. A random RNA selection procedure revealed that Hel-N1 prefers to bind RNAs containing short stretches of uridylates similar to those found in the 3' untranslated regions (3' UTRs) of oncoprotein and cytokine mRNAs such as c-myc, c-fos, and granulocyte macrophage colony-stimulating factor. Direct binding studies demonstrated that Hel-N1 bound and formed multimers with c-myc 3' UTR mRNA and required, as a minimum, a specific 29-nucleotide stretch containing AUUUG, AUUUA, and GUUUUU. Deletion analysis demonstrated that a fragment of Hel-N1 containing 87 amino acids, encompassing the third RNA recognition motif, forms an RNA binding domain for the c-myc 3' UTR. In addition, Hel-N1 was shown to be reactive with autoantibodies from patients with paraneoplastic encephalomyelitis both before and after binding to c-myc mRNA.


Nature ◽  
1997 ◽  
Vol 386 (6621) ◽  
pp. 187-190 ◽  
Author(s):  
Yoshinori Watanabe ◽  
Satoko Shinozaki-Yabana ◽  
Yuji Chikashige ◽  
Yasushi Hiraoka ◽  
Masayuki Yamamoto

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