Lećin vlaknasti unutrašnji membranski protein je protein koji je kod ljudikodirangenom, sa hromosoma 19. LIM2.[5][6]
Ćelijska membrana sisarskog sočiva sadrži pet glavnih proteina, veličine od 70 kD do 19 kD. Specifična funkcija ovih proteina je nepoznata. Pokazalo se da su neki od njih uključeni u pojavu katarakta, npr. Kristalni gama-1 (CRYG1), drugi najrasprostranjeniji unutrašnji membranski ćelijski protein vlakana sočiva je MP19, nazvan tako po glavnim proteinima sočiva molekulske težine 19,5 kD.[6]
Ovaj protein sadrži četiri transmembranska domena, supstrat je za cAMP-ovisni protein kinazu i protein-kinazu C i veže se s kalmodulinom. Svi zajedno sugeriraju da MP19 na neki način funkcionira kao prerađena komponenta, koja je možda uključena u komunikaciju sa sočivnim ćelijama. Pokazalo se da je uključen u kataraktogenezu (prema OMIM)
Church RL, Wang JH (1994). "The human lens fiber-cell intrinsic membrane protein MP19 gene: isolation and sequence analysis". Curr. Eye Res. 12 (12): 1057–65. doi:10.3109/02713689309033503. PMID8137630.
Wistow G, Bernstein SL, Ray S, et al. (2002). "Expressed sequence tag analysis of adult human iris for the NEIBank Project: steroid-response factors and similarities with retinal pigment epithelium". Mol. Vis. 8: 185–95. PMID12107412.
Wistow G, Bernstein SL, Wyatt MK, et al. (2002). "Expressed sequence tag analysis of adult human lens for the NEIBank Project: over 2000 non-redundant transcripts, novel genes and splice variants". Mol. Vis. 8: 171–84. PMID12107413.
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