Spectrin, beta, non-erythrocytic 4, also known as SPTBN4, is a protein that in humans is encoded by the SPTBN4gene.
Spectrin is an actin crosslinking and molecular scaffold protein that links the cell membrane to the actin cytoskeleton, and functions in the determination of cell shape, arrangement of transmembrane proteins, and organization of organelles. It is composed of two antiparallel dimers of alpha- and beta- subunits. This gene is one member of a family of beta-spectrin genes. The encoded protein localizes to the nuclear matrix, PML nuclear bodies, and cytoplasmic vesicles. A highly similar gene in the mouse is required for localization of specific membrane proteins in polarized regions of neurons. Multiple transcript variants encoding different isoforms have been found for this gene.
^Morris, Jill A; Kandpal Geeta; Ma Lei; Austin Christopher P (Jul 2003). "DISC1 (Disrupted-In-Schizophrenia 1) is a centrosome-associated protein that interacts with MAP1A, MIPT3, ATF4/5 and NUDEL: regulation and loss of interaction with mutation". Hum. Mol. Genet. (England) 12 (13): 1591–608. doi:10.1093/hmg/ddg162. ISSN0964-6906. PMID12812986.
Nagase T, Kikuno R, Nakayama M, et al. (2001). "Prediction of the coding sequences of unidentified human genes. XVIII. The complete sequences of 100 new cDNA clones from brain which code for large proteins in vitro.". DNA Res.7 (4): 273–81. doi:10.1093/dnares/7.4.271. PMID10997877.
Tse WT, Tang J, Jin O, et al. (2001). "A new spectrin, beta IV, has a major truncated isoform that associates with promyelocytic leukemia protein nuclear bodies and the nuclear matrix.". J. Biol. Chem.276 (26): 23974–85. doi:10.1074/jbc.M009307200. PMID11294830.
Shoeman RL, Hartig R, Hauses C, Traub P (2003). "Organization of focal adhesion plaques is disrupted by action of the HIV-1 protease.". Cell Biol. Int.26 (6): 529–39. doi:10.1006/cbir.2002.0895. PMID12119179.
Morris JA, Kandpal G, Ma L, Austin CP (2004). "DISC1 (Disrupted-In-Schizophrenia 1) is a centrosome-associated protein that interacts with MAP1A, MIPT3, ATF4/5 and NUDEL: regulation and loss of interaction with mutation.". Hum. Mol. Genet.12 (13): 1591–608. doi:10.1093/hmg/ddg162. PMID12812986.
Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs.". Nat. Genet.36 (1): 40–5. doi:10.1038/ng1285. PMID14702039.