Beta-actin (human gene and protein symbol ACTB/ACTB) is one of six different actin isoforms which have been identified in humans. This is one of the two nonmuscle cytoskeletal actins. Actins are highly conserved proteins that are involved in cell motility, structure and integrity. Alpha actins are a major constituent of the contractile apparatus.
Beta-actin has been shown to interact with SPTBN2. In addition, RNA-binding protein Sam68 was found to interact with the mRNA encoding β-actin, which regulates the synaptic formation of the dendritic spines with its cytoskeletal components.
Beta-actin has been shown to activate eNOS, thereby increasing NO production. An eight-amino acid residue (326-333) in actin has been shown to mediate the interaction between actin and eNOS
^Gunning PW, Ghoshdastider U, Whitaker S, Popp D, Robinson RC (Jun 2015). "The evolution of compositionally and functionally distinct actin filaments". Journal of Cell Science128 (11): 2009–2019. doi:10.1242/jcs.165563. PMID25788699.
^Hanukoglu I, Tanese N, Fuchs E (Feb 1983). "Complementary DNA sequence of a human cytoplasmic actin. Interspecies divergence of 3' non-coding regions". Journal of Molecular Biology163 (4): 673–8. doi:10.1016/0022-2836(83)90117-1. PMID6842590.
^Mao B, Wu W, Li Y, Hoppe D, Stannek P, Glinka A et al. (May 2001). "LDL-receptor-related protein 6 is a receptor for Dickkopf proteins". Nature411 (6835): 321–5. doi:10.1038/35077108. PMID11357136.
^Holleran EA, Ligon LA, Tokito M, Stankewich MC, Morrow JS, Holzbaur EL (Sep 2001). "beta III spectrin binds to the Arp1 subunit of dynactin". The Journal of Biological Chemistry276 (39): 36598–605. doi:10.1074/jbc.M104838200. PMID11461920.
^Kondrikov D, Fonseca FV, Elms S, Fulton D, Black SM, Block ER et al. (Feb 2010). "Beta-actin association with endothelial nitric-oxide synthase modulates nitric oxide and superoxide generation from the enzyme". The Journal of Biological Chemistry285 (7): 4319–27. doi:10.1074/jbc.M109.063172. PMID19946124.
Gunning P, Weinberger R, Jeffrey P (Apr 1997). "Actin and tropomyosin isoforms in morphogenesis". Anatomy and Embryology195 (4): 311–5. doi:10.1007/s004290050050. PMID9108196.
Kimura T, Hashimoto I, Nishikawa M, Fujisawa JI (1997). "A role for Rev in the association of HIV-1 gag mRNA with cytoskeletal beta-actin and viral protein expression". Biochimie78 (11-12): 1075–80. doi:10.1016/S0300-9084(97)86732-6. PMID9150887.