NMR studies on the interactions between yeast Vta1 and Did2 during the multivesicular bodies sorting pathway
As an AAA-ATPase, Vps4 is important for function of multivesicular bodies (MVB) sorting pathway, which involves in cellular phenomena ranging from receptor down-regulation to viral budding to cytokinesis. The activity of Vps4 is stimulated by the interactions between Vta1 N-terminus (named as Vta1NT...
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Published in | Scientific reports Vol. 6; no. 1; p. 38710 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
England
Nature Publishing Group
07.12.2016
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Subjects | |
Online Access | Get full text |
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Summary: | As an AAA-ATPase, Vps4 is important for function of multivesicular bodies (MVB) sorting pathway, which involves in cellular phenomena ranging from receptor down-regulation to viral budding to cytokinesis. The activity of Vps4 is stimulated by the interactions between Vta1 N-terminus (named as Vta1NTD) and Did2 fragment (176-204 aa) (termed as Did2
) or Vps60 (128-186 aa) (termed as Vps60
). The structural basis of how Vta1NTD binds to Did2
is still unclear. To address this, in this report, the structure of Did2
in complex with Vta1NTD was determined by NMR techniques, demonstrating that Did2
interacts with Vta1NTD through its helix α6' extending over the 2
and the 3
α-helices of Vta1NTD microtubule interacting and transport 1 (MIT1) domain. The residues within Did2
helix α6' in the interface make up of an amino acid sequence as E
'xxL
'xxR
'L
'xxL
'R
', identical to type 1 MIT-interacting motif (MIM1) (D/E)xxLxxRLxxL(K/R) of CHMP1A
observed in Vps4-CHMP1A complex structure, indicating that Did2 binds to Vta1NTD through canonical MIM1 interactions. Moreover, the Did2 binding does not result in Vta1NTD significant conformational changes, revealing that Did2, similar to Vps60, enhances Vta1 stimulation of Vps4 ATPase activity in an indirect manner. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 These authors contributed equally to this work. |
ISSN: | 2045-2322 2045-2322 |
DOI: | 10.1038/srep38710 |