Gene interactions and pathways from curated databases and text-mining
Eur J Cell Biol 2009, PMID: 19004523

The membrane-tubulating potential of amphiphysin 2/BIN1 is dependent on the microtubule-binding cytoplasmic linker protein 170 (CLIP-170).

Meunier, Brigitte; Quaranta, Muriel; Daviet, Laurent; Hatzoglou, Anastassia; Leprince, Corinne

Amphiphysins are BIN-amphiphysin-RVS (BAR) domain-containing proteins that influence membrane curvature in sites such as T-tubules in muscular cells, endocytic pits in neuronal as well as non-neuronal cells, and possibly cytoplasmic endosomes. This effect on lipid membranes is fulfilled by diverse amphiphysin 2/BIN1 isoforms, generated by alternative splicing and showing distinct structural and functional properties. In this study, our goal was to characterize the functional role of a ubiquitously expressed amphiphysin 2/BIN1 by the characterization of new molecular partners. We performed a two-hybrid screen with an isoform of amphiphysin 2/BIN1 expressed in HeLa cells. We identified CLIP-170 as an amphiphysin 2/BIN1-interacting molecule. CLIP-170 is a plus-end tracking protein involved in microtubule (MT) stability and recruitment of dynactin. The binding between amphiphysin 2/BIN1 and CLIP-170 is dependent on the N-terminal part of amphiphysin 2 (mostly the BAR domain) and an internal coiled-coil region of CLIP-170. This partnership was confirmed by GST pull-down assay and by co-immunoprecipitation in HeLa cells that express endogenous amphiphysin 2 (mostly isoforms 6, 9 and 10). When overexpressed in HeLa cells, amphiphysin 2/BIN1 leads to the formation of intracellular tubules which can closely align with MTs. After MT depolymerization by nocodazole, amphiphysin 2-stained tubules disappear, and reappear after nocodazole washout. Furthermore, depletion of CLIP-170 by RNAi induced a decrease in the proportion of cells with amphiphysin 2-stained tubules and an increase in the proportion of cells with no tubules. This result suggests the existence of a mechanistic link between the two types of tubules, which is likely to involve the +TIP protein, CLIP-170. Amphiphysin 2/BIN1 may be an anchoring point on membranes for CLIP-170, and consequently for MT. Then, the pushing force of polymerizing MT could help amphiphysin 2/BIN1 in its tubulation potential. We propose that amphiphysin 2/BIN1 participates in the tubulation of traffic intermediates and intracellular organelles first via its intrinsic tubulating potential and second via its ability to bind CLIP-170 and MT.

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Text Mining Data

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Manually curated Databases

  • IRef Biogrid Interaction: CLIP1 — BIN1 (physical association, affinity chromatography technology)
  • IRef Biogrid Interaction: CLIP1 — BIN1 (direct interaction, two hybrid)
  • Gene Ontology Complexes microtubule: microtubule complex (DNAH11-DYNLL2-INVS-TEKT4-KIF2C-KIF2B-TUBA3C-TUBA3E-EML6-EML4-CAPN6-FAM110C-TPGS1-MAPRE1-MAPRE3-JAKMIP1-CENPJ-SPAG6-MTUS1-MTUS2-KIFC2-SHROOM3-DYNC2H1-KIF15-KIF24-KIF5B-KIF5C-KIF23-KIF22-KIF5A-KIF27-TUBE1-GTSE1-STMN1-INCENP-RASSF1-RASSF3-RASSF5-KIF26A-KIF26B-KATNA1-DNM2-APOE-HAUS8-TUBA1B-TUBA1A-TEKT5-HAUS3-CCT4-KIF6-TUBB4A-MAP1LC3A-TUBD1-MAP1LC3C-MAP1LC3B-DYNC2LI1-NINL-MAP1A-MAP1B-TUBB8-TUBB6-TCTE3-TUBB3-KATNAL1-NUSAP1-TUBB1-TUBB2A-KIF3C-TUBB2B-DNAH3-MAP1LC3B2-TUBAL3-DNAH6-DNAH5-CAMSAP2-CAMSAP3-CAMSAP1-TUBB-GAS8-TUBA8-KIF14-SPRY2-KIF17-KIF11-KIF12-TRIM55-TRIM54-CFAP20-KIF19-GAS2L1-CEP162-KIF3B-TPPP3-HCA90-GAS2L2-FGF13-REEP3-KIF3A-KIF21B-IGBP1-DNM1P34-CRHBP-INO80-TRIM63-KIF1C-TBCE-TBCC-TBCA-SPAG17-KIF20B-TUBGCP5-KIF20A-DNM1P46-MAP6-MAP7-MAP4-TUBB4B-MID2-IQGAP2-GABARAPL3-TPPP-PTPN20A-NUDC-KIF4B-KIF4A-SKA1-CLIP1-DVL1-WHAMM-DYNLRB1-CCT6A-MID1IP1-RP1-TTLL1-RMDN3-HOOK2-HOOK3-KIF18A-TTLL8-KIF18B-MAP7D3-MAP7D2-MAP7D1-PCNT-DYNC1H1-TUBA4A-TUBA4B-RCC2-NICN1-SPAST-MAP6D1-TUBG1-KIF13B-TUBG2-TCP11L1)
In total, 11936 gene pairs are associated to this article in curated databases