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Ponavljanje bogato leucinom

Primer proteina sa ponavljanjem bogatim leucinom, svinjski inhibitor ribonukleaze
Identifikatori
SimbolLRR_1
PfamPF00560
Pfam klanCL0022
InterProIPR001611
SCOP2bnh
SUPERFAMILY2bnh
OPM protein1xwd
Varijanta ponavljanja bogatog leucinom
Varijanta ponavljanja bogatog leucinom
Identifikatori
SimbolLRV
PfamPF01816
Pfam klanCL0020
InterProIPR004830
SCOP1lrv
SUPERFAMILY1lrv

Ponavljanje bogato leucinom (LRR) je proteinski strukturni motiv koji formira strukturu α/β potkovice.[1][2] On se sastoji od ponavljanja koja su 20–30 aminokiselina duga, i koja su obično bogata u hidrofobnoj aminokiselini leucinu. Tipično, svaka jedinica ponavljanja ima beta lanac-okret-alfa heliks strukturu. Domen formiran od mnogih takvih ponavljanja ima oblik potkovice sa unutrašnjom paralelnom beta ravni i spoljašnjim nizom heliksa. Jedno lice beta ravni i jedna strana niza heliksa su izloženi rastvaraču i stoga su bogati u hidrofilnim ostacima. Region između heliksa i ravni je proteinska hidrofobna osnova i čvrsto je sterično pakovana leucinskim ostacima.

Ponavljanja bogato leucinom često učestvuju u formiranju međuproteinskih interakcija.[3][4]

  1. ^ Kobe B, Deisenhofer J (1994). „The leucine-rich repeat: a versatile binding motif”. Trends Biochem. Sci. 19 (10): 415—21. PMID 7817399. doi:10.1016/0968-0004(94)90090-6. 
  2. ^ Enkhbayar P, Kamiya M, Osaki M, Matsumoto T, Matsushima N (2004). „Structural principles of leucine-rich repeat (LRR) proteins”. Proteins. 54 (3): 394—403. PMID 14747988. doi:10.1002/prot.10605. 
  3. ^ Kobe B, Kajava AV (2001). „The leucine-rich repeat as a protein recognition motif”. Curr. Opin. Struct. Biol. 11 (6): 725—32. PMID 11751054. doi:10.1016/S0959-440X(01)00266-4. 
  4. ^ Gay NJ, Packman LC, Weldon MA, Barna JC (1991). „A leucine-rich repeat peptide derived from the Drosophila Toll receptor forms extended filaments with a beta-sheet structure”. FEBS Lett. 291 (1): 87—91. PMID 1657640. doi:10.1016/0014-5793(91)81110-T. 

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Ponavljanje bogato leucinom
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