SNTB2

Syntrophin, beta 2 (dystrophin-associated protein A1, 59kDa, basic component 2)
Available structures PDB Ortholog search: PDBe, RCSB List of PDB id codes 2VRF​
Identifiers
Symbols	SNTB2 ; D16S2531E; EST25263; SNT2B2; SNT3; SNTL
External IDs	OMIM: 600027 MGI: 101771 HomoloGene: 4911 GeneCards: SNTB2 Gene
Gene ontology Molecular function • actin binding • structural molecule activity • protein binding • calmodulin binding • poly(A) RNA binding Cellular component • cytoplasm • microtubule • focal adhesion • dystrophin-associated glycoprotein complex • membrane • transport vesicle membrane • protein complex • synapse • extracellular exosome Sources: Amigo / QuickGO
Orthologs
Species	Human	Mouse
Entrez	6645	20650
Ensembl	ENSG00000168807	ENSMUSG00000041308
UniProt	Q13425	Q61235
RefSeq (mRNA)	NM_006750	NM_009229
RefSeq (protein)	NP_006741	NP_033255
Location (UCSC)	Chr 16: 69.19 – 69.31 Mb	Chr 8: 106.94 – 107.01 Mb
PubMed search

Beta-2-syntrophin is a protein that in humans is encoded by the SNTB2 gene.^[1][2][3]

Function

Dystrophin is a large, rod-like cytoskeletal protein found at the inner surface of muscle fibers. Dystrophin is missing in Duchenne Muscular Dystrophy patients and is present in reduced amounts in Becker Muscular Dystrophy patients. The protein encoded by this gene is a peripheral membrane protein found associated with dystrophin and dystrophin-related proteins. This gene is a member of the syntrophin gene family, which contains at least two other structurally related genes.^[3]

Interactions

SNTB2 has been shown to interact with ABCA1.^[4]

References

1. Ahn AH, Freener CA, Gussoni E, Yoshida M, Ozawa E, Kunkel LM (March 1996). "The three human syntrophin genes are expressed in diverse tissues, have distinct chromosomal locations, and each bind to dystrophin and its relatives". J Biol Chem 271 (5): 2724–30. doi:10.1074/jbc.271.5.2724. PMID 8576247.
2. Ahn AH, Yoshida M, Anderson MS, Feener CA, Selig S, Hagiwara Y, Ozawa E, Kunkel LM (June 1994). "Cloning of human basic A1, a distinct 59-kDa dystrophin-associated protein encoded on chromosome 8q23-24". Proc Natl Acad Sci U S A 91 (10): 4446–50. doi:10.1073/pnas.91.10.4446. PMC 43802. PMID 8183929.
3. "Entrez Gene: SNTB2 syntrophin, beta 2 (dystrophin-associated protein A1, 59kDa, basic component 2)".
4. Buechler C, Boettcher A, Bared SM, Probst MC, Schmitz G (May 2002). "The carboxyterminus of the ATP-binding cassette transporter A1 interacts with a beta2-syntrophin/utrophin complex". Biochem. Biophys. Res. Commun. 293 (2): 759–65. doi:10.1016/S0006-291X(02)00303-0. PMID 12054535.

Further reading

• Blake DJ (2002). "Dystrobrevin dynamics in muscle-cell signalling: a possible target for therapeutic intervention in Duchenne muscular dystrophy?". Neuromuscul. Disord. 12 Suppl 1: S110–7. doi:10.1016/S0960-8966(02)00091-3. PMID 12206805.
• Gee SH, Madhavan R, Levinson SR, Caldwell JH, Sealock R, Froehner SC (1998). "Interaction of muscle and brain sodium channels with multiple members of the syntrophin family of dystrophin-associated proteins". J. Neurosci. 18 (1): 128–37. PMID 9412493.
• Lumeng C, Phelps S, Crawford GE, Walden PD, Barald K, Chamberlain JS (1999). "Interactions between beta 2-syntrophin and a family of microtubule-associated serine/threonine kinases". Nat. Neurosci. 2 (7): 611–7. doi:10.1038/10165. PMID 10404183.
• Garcia RA, Vasudevan K, Buonanno A (2000). "The neuregulin receptor ErbB-4 interacts with PDZ-containing proteins at neuronal synapses". Proc. Natl. Acad. Sci. U.S.A. 97 (7): 3596–601. doi:10.1073/pnas.070042497. PMC 16285. PMID 10725395.
• Adams ME, Kramarcy N, Krall SP, Rossi SG, Rotundo RL, Sealock R, Froehner SC (2000). "Absence of α-Syntrophin Leads to Structurally Aberrant Neuromuscular Synapses Deficient in Utrophin". J. Cell Biol. 150 (6): 1385–98. doi:10.1083/jcb.150.6.1385. PMC 2150701. PMID 10995443.
• Ort T, Maksimova E, Dirkx R, Kachinsky AM, Berghs S, Froehner SC, Solimena M (2001). "The receptor tyrosine phosphatase-like protein ICA512 binds the PDZ domains of beta2-syntrophin and nNOS in pancreatic beta-cells". Eur. J. Cell Biol. 79 (9): 621–30. doi:10.1078/0171-9335-00095. PMID 11043403.
• Marchand S, Stetzkowski-Marden F, Cartaud J (2001). "Differential targeting of components of the dystrophin complex to the postsynaptic membrane". Eur. J. Neurosci. 13 (2): 221–9. doi:10.1046/j.1460-9568.2001.01373.x. PMID 11168526.
• Hogan A, Shepherd L, Chabot J, Quenneville S, Prescott SM, Topham MK, Gee SH (2001). "Interaction of gamma 1-syntrophin with diacylglycerol kinase-zeta. Regulation of nuclear localization by PDZ interactions". J. Biol. Chem. 276 (28): 26526–33. doi:10.1074/jbc.M104156200. PMID 11352924.
• Ort T, Voronov S, Guo J, Zawalich K, Froehner SC, Zawalich W, Solimena M (2001). "Dephosphorylation of β2-syntrophin and Ca2+/µ-calpain-mediated cleavage of ICA512 upon stimulation of insulin secretion". EMBO J. 20 (15): 4013–23. doi:10.1093/emboj/20.15.4013. PMC 149140. PMID 11483505.
• Buechler C, Boettcher A, Bared SM, Probst MC, Schmitz G (2002). "The carboxyterminus of the ATP-binding cassette transporter A1 interacts with a beta2-syntrophin/utrophin complex". Biochem. Biophys. Res. Commun. 293 (2): 759–65. doi:10.1016/S0006-291X(02)00303-0. PMID 12054535.
• Kutsenko AS, Gizatullin RZ, Al-Amin AN, Wang F, Kvasha SM, Podowski RM, Matushkin YG, Gyanchandani A, Muravenko OV, Levitsky VG, Kolchanov NA, Protopopov AI, Kashuba VI, Kisselev LL, Wasserman W, Wahlestedt C, Zabarovsky ER (2002). "NotI flanking sequences: a tool for gene discovery and verification of the human genome". Nucleic Acids Res. 30 (14): 3163–70. doi:10.1093/nar/gkf428. PMC 135748. PMID 12136098.
• Chagnon P, Michaud J, Mitchell G, Mercier J, Marion JF, Drouin E, Rasquin-Weber A, Hudson TJ, Richter A (2003). "A Missense Mutation (R565W) in Cirhin (FLJ14728) in North American Indian Childhood Cirrhosis". Am. J. Hum. Genet. 71 (6): 1443–9. doi:10.1086/344580. PMC 378590. PMID 12417987.
• Jones KJ, Compton AG, Yang N, Mills MA, Peters MF, Mowat D, Kunkel LM, Froehner SC, North KN (2003). "Deficiency of the syntrophins and alpha-dystrobrevin in patients with inherited myopathy". Neuromuscul. Disord. 13 (6): 456–67. doi:10.1016/S0960-8966(03)00066-X. PMID 12899872.
• Hillman RT, Green RE, Brenner SE (2005). "An unappreciated role for RNA surveillance". Genome Biol. 5 (2): R8. doi:10.1186/gb-2004-5-2-r8. PMC 395752. PMID 14759258.
• Leonoudakis D, Conti LR, Anderson S, Radeke CM, McGuire LM, Adams ME, Froehner SC, Yates JR, Vandenberg CA (2004). "Protein trafficking and anchoring complexes revealed by proteomic analysis of inward rectifier potassium channel (Kir2.x)-associated proteins". J. Biol. Chem. 279 (21): 22331–46. doi:10.1074/jbc.M400285200. PMID 15024025.