Endogenous retrovirus group K member 5 Env polyprotein (Envelope polyprotein) (HERV-K(II) envelope protein) (HERV-K_3q12.3 provirus ancestral Env polyprotein) [Includes: Truncated surface protein (SU)]
1_MVTPV 6_ TWMDN 11_ PIEVY 16_ VNDSV 21_ WVPGP 26_ TDDRC 31_ PAKPE 36_ EEGMM 41_ INISI 46_ VYRYP 51_ PICLG 56_ RAPGC 61_ LMPAV 66_ QNWLV 71_ EVPTV 76_ SPNSR 81_ FTYHM 86_ VSGMS 91_ LRPRV 96_ NYLQD 101_ FSYQR 106_ SLKFR 111_ PKGKP 116_ CPKEI 121_ PKESK 126_ NTEVL 131_ VWEEC 136_ VANSA 141_ VILQN 146_ NEFGT 151_ IIDWA 156_ PRGQF 161_ YHNCS 166_ GQTQS 171_ CPSAQ 176_ VSPAV 181_ DSDLT 186_ ESLDK 191_ HKHKK 196_ LQSFY 201_ PWEWG 206_ EKGIS 211_ TPRPE 216_ IISPV 221_ SGPEH 226_ PELWR 231_ LWPDT 236_TLEFG
1: Retroviral envelope proteins mediate receptor recognition and membrane fusion during early infection. Endogenous envelope proteins may have kept, lost or modified their original function during evolution