Mammalian actin-binding protein-1/hip-55 interacts with fhl2 and negatively regulates cell invasion

Lindsy R. Boateng, David Bennin, Sofia De Oliveira, Anna Huttenlocher

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Mammalian actin-binding protein-1 (mAbp1) is an adaptor protein that binds actin and modulates scission during endocytosis. Recent studies suggest that mAbp1 impairs cell invasion; however, the mechanism for the inhibitory effects of mAbp1 remain unclear. We performed a yeast two-hybrid screen and identified the adaptor protein, FHL2, as a novel binding partner that interacts with the N-terminal actin depolymerizing factor homology domain (ADFH) domain of mAbp1. Here we report that depletion of mAbp1 or ectopic expression of the ADFH domain of mAbp1 increased Rho GTPase signaling and breast cancer cell invasion. Moreover, cell invasion induced by the ADFH domain of mAbp1 required the expression of FHL2. Taken together, our findings show that mAbp1 and FHL2 are novel binding partners that differentially regulate Rho GTPase signaling and MTLn3 breast cancer cell invasion.

Original languageEnglish (US)
Pages (from-to)13987-13998
Number of pages12
JournalJournal of Biological Chemistry
Issue number27
StatePublished - Jul 1 2016
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology


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