Gamma-tubulin complex is necessary for microtubule nucleation at the centrosome. Gamma-tubulin complex is composed of gamma-tubulin, TUBGCP2, TUBGCP3, TUBGCP4, TUBGCP5 and TUBGCP6. Widely expressed, with highest levels in heart and skeletal muscle and moderate levels in brain. Belongs to the TUBGCP family. Truncated C-terminus.