Translocon-associated protein subunit alpha (TRAP-alpha) (Signal sequence receptor subunit alpha) (SSR-alpha)
1_MRLLP 6_ RLLLL 11_ LLLVF 16_ PATVL 21_ FRGGP 26_ RGLLA 31_ VAQDL 36_ TEDEE 41_ TVEDS 46_ IIEDE 51_ DDEAE 56_ VEEDE 61_ PTDLV 66_ EDKEE 71_ EDVSG 76_ EPEAS 81_ PSADT 86_ TILFV 91_ KGEDF 96_ PANNI 101_ VKFLV 106_ GFTNK 111_ GTEDF 116_ IVESL 121_ DASFR 126_ YPQDY 131_ QFYIQ 136_ NFTAL 141_ PLNTV 146_ VPPQR 151_ QATFE 156_ YSFIP 161_ AEPMG 166_ GRPFG 171_ LVINL 176_ NYKDL 181_ NGNVF 186_ QDAVF 191_ NQTVT 196_ VIERE 201_ DGLDG 206_ ETIFM 211_ YMFLA 216_ GLGLL 221_ VIVGL 226_ HQLLE 231_ SRKRK 236_ RPIQK 241_ VEMGT 246_ SSQND 251_ VDMSW 256_ IPQET 261_ LNQIN 266_ KASPR 271_ RLPRK 276_ RAQKR 281_SVGSD
1: TRAP proteins are part of a complex whose function is to bind calcium to the ER membrane and thereby regulate the retention of ER resident proteins. May be involved in the recycling of the translocation apparatus after completion of the translocation process or may function as a membrane-bound chaperone facilitating folding of translocated proteins