Beta-arrestin zülal ailəsinin üzvlərinin G zülalı ilə əlaqəli reseptorların agonist vasitəçiliyi ilə desensitizasiyasında iştirak etdiyi və hormonlar, neyrotransmitterlər və ya duyğu siqnalları kimi stimullara hüceyrə reaksiyalarının spesifik şəkildə yatırılmasına səbəb olduğu düşünülür.
Arrestin beta 1 sitozolik zülaldır və beta-adrenergik reseptorların beta-adrenergik reseptor[3] kinaz (BARK)[4] vasitəçiliyi ilə desensibilizasiyasında kofaktor kimi çıxış edir.
Arrestin beta 1 mərkəzi sinir sistemi ilə yanaşı, periferik qan leykositlərində yüksək səviyyədə ifadə edilir və beləliklə, BARK/beta-arrestin sisteminin reseptor vasitəçiliyi ilə immun funksiyalarının tənzimlənməsində böyük rol oynadığına inanılır.
Alternativ olaraq, arrestin beta 1-in müxtəlif izoformlarını kodlayan birləşdirilmiş transkriptlər təsvir edilmişdir, lakin onların dəqiq funksiyaları məlum deyil.[2] Beta-arrestinin aralıq maddələri birləşdirən və reseptorları klatrin vasitəçiliyi ilə endositoza birləşdirərək G-protein siqnalını yönləndirə bilən bir çərçivə rolunu oynadığı göstərilir.[5]
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↑ 12Claing A, Chen W, Miller WE, Vitale N, Moss J, Premont RT, Lefkowitz RJ. "beta-Arrestin-mediated ADP-ribosylation factor 6 activation and beta 2-adrenergic receptor endocytosis". The Journal of Biological Chemistry. 276 (45). November 2001: 42509–42513. doi:10.1074/jbc.M108399200. PMID11533043.
↑Conlan LA, Martin TJ, Gillespie MT. "The COOH-terminus of parathyroid hormone-related protein (PTHrP) interacts with beta-arrestin 1B". FEBS Letters. 527 (1–3). September 2002: 71–75. doi:10.1016/S0014-5793(02)03164-2. PMID12220636.
↑Wang P, Wu Y, Ge X, Ma L, Pei G. "Subcellular localization of beta-arrestins is determined by their intact N domain and the nuclear export signal at the C terminus". The Journal of Biological Chemistry. 278 (13). March 2003: 11648–11653. doi:10.1074/jbc.M208109200. PMID12538596.
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