This domain can be found in the C terminus of the IQGAP family members, including human IQGAP1/2/3, S. cerevisiae Iqg1 and S. pombe Rng2. Some members function in cytoskeletal remodelling [1]. Human IQGAP1 is a scaffolding protein that can assemble multi-protein complexes involved in cell-cell interaction, cell adherence, and movement via actin/tubulin-based cytoskeletal reorganization [2]. IQGAP1 is also a regulator of the MAPK and Wnt/beta-catenin signaling pathways [1].Iqg1 and Rng2 are required for actomyosin ring construction during cytokinesis [3,4].

1: IQGAP1: insights into the function of a molecular puppeteer. Abel AM, Schuldt KM, Rajasekaran K, Hwang D, Riese MJ, Rao S, Thakar MS, Malarkannan S; Mol Immunol. 2015;65:336-349. PMID:25733387

2: IQGAPs as Key Regulators of Actin-cytoskeleton Dynamics. Watanabe T, Wang S, Kaibuchi K; Cell Struct Funct. 2015;40:69-77. PMID:26051604

3: An IQGAP-related protein controls actin-ring formation and cytokinesis in yeast. Epp JA, Chant J; Curr Biol. 1997;7:921-929. PMID:9382845

4: Rng2p, a protein required for cytokinesis in fission yeast, is a component of the actomyosin ring and the spindle pole body. Eng K, Naqvi NI, Wong KC, Balasubramanian MK; Curr Biol. 1998;8:611-621. PMID:9635188