Protein name:
Retinal-specific ATP-binding cassette transporter;
Alternative:
RIM ABC transporter(RIM protein;RmP);ATP-binding cassette sub-family A member 4;Stargardt disease protein;
Organism:
Human (Homo sapiens).
General Annotation
Function:
In the visual cycle, acts as an inward-directed retinoid flipase, retinoid substrates imported by ABCA4 from the extracellular or intradiscal (rod) membrane surfaces to the cytoplasmic membrane surface are all-trans-retinaldehyde (ATR) and N-retinyl-phosphatidyl-ethanolamine (NR-PE). Once transported to the cytoplasmic surface, ATR is reduced to vitamin A by trans-retinol dehydrogenase (tRDH) and then transferred to the retinal pigment epithelium (RPE) where it is converted to 11-cis-retinal. May play a role in photoresponse, removing ATR/NR-PE from the extracellular photoreceptor surfaces during bleach recovery.
Subcellular Location:
Membrane
Multi-pass membrane protein
Localized to outer segment disk edges of rods and cones, with around one million copies/photoreceptor.
Protein Attributes:
50:
MGFVRQIQLL | LWKNWTLRKR | QKIRFVVELV | WPLSLFLVLI | WLRNANPLYS |
100:
HHECHFPNKA | MPSAGMLPWL | QGIFCNVNNP | CFQSPTPGES | PGIVSNYNNS |
150:
ILARVYRDFQ | ELLMNAPESQ | HLGRIWTELH | ILSQFMDTLR | THPERIAGRG |
200:
IRIRDILKDE | ETLTLFLIKN | IGLSDSVVYL | LINSQVRPEQ | FAHGVPDLAL |
250:
KDIACSEALL | ERFIIFSQRR | GAKTVRYALC | SLSQGTLQWI | EDTLYANVDF |
300:
FKLFRVLPTL | LDSRSQGINL | RSWGGILSDM | SPRIQEFIHR | PSMQDLLWVT |
350:
RPLMQNGGPE | TFTKLMGILS | DLLCGYPEGG | GSRVLSFNWY | EDNNYKAFLG |
400:
IDSTRKDPIY | SYDRRTTSFC | NALIQSLESN | PLTKIAWRAA | KPLLMGKILY |
450:
TPDSPAARRI | LKNANSTFEE | LEHVRKLVKA | WEEVGPQIWY | FFDNSTQMNM |
500:
IRDTLGNPTV | KDFLNRQLGE | EGITAEAILN | FLYKGPRESQ | ADDMANFDWR |
550:
DIFNITDRTL | RLVNQYLECL | VLDKFESYND | ETQLTQRALS | LLEENMFWAG |
600:
VVFPDMYPWT | SSLPPHVKYK | IRMDIDVVEK | TNKIKDRYWD | SGPRADPVED |
650:
FRYIWGGFAY | LQDMVEQGIT | RSQVQAEAPV | GIYLQQMPYP | CFVDDSFMII |
700:
LNRCFPIFMV | LAWIYSVSMT | VKSIVLEKEL | RLKETLKNQG | VSNAVIWCTW |
750:
FLDSFSIMSM | SIFLLTIFIM | HGRILHYSDP | FILFLFLLAF | STATIMLCFL |
800:
LSTFFSKASL | AAACSGVIYF | TLYLPHILCF | AWQDRMTAEL | KKAVSLLSPV |
850:
AFGFGTEYLV | RFEEQGLGLQ | WSNIGNSPTE | GDEFSFLLSM | QMMLLDAAVY |
900:
GLLAWYLDQV | FPGDYGTPLP | WYFLLQESYW | LGGEGCSTRE | ERALEKTEPL |
950:
TEETEDPEHP | EGIHDSFFER | EHPGWVPGVC | VKNLVKIFEP | CGRPAVDRLN |
1000:
ITFYENQITA | FLGHNGAGKT | TTLSILTGLL | PPTSGTVLVG | GRDIETSLDA |
1050:
VRQSLGMCPQ | HNILFHHLTV | AEHMLFYAQL | KGKSQEEAQL | EMEAMLEDTG |
1100:
LHHKRNEEAQ | DLSGGMQRKL | SVAIAFVGDA | KVVILDEPTS | GVDPYSRRSI |
1150:
WDLLLKYRSG | RTIIMSTHHM | DEADLLGDRI | AIIAQGRLYC | SGTPLFLKNC |
1200:
FGTGLYLTLV | RKMKNIQSQR | KGSEGTCSCS | SKGFSTTCPA | HVDDLTPEQV |
1250:
LDGDVNELMD | VVLHHVPEAK | LVECIGQELI | FLLPNKNFKH | RAYASLFREL |
1300:
EETLADLGLS | SFGISDTPLE | EIFLKVTEDS | DSGPLFAGGA | QQKRENVNPR |
1350:
HPCLGPREKA | GQTPQDSNVC | SPGAPAAHPE | GQPPPEPECP | GPQLNTGTQL |
1400:
VLQHVQALLV | KRFQHTIRSH | KDFLAQIVLP | ATFVFLALML | SIVIPPFGEY |
1450:
PALTLHPWIY | GQQYTFFSMD | EPGSEQFTVL | ADVLLNKPGF | GNRCLKEGWL |
1500:
PEYPCGNSTP | WKTPSVSPNI | TQLFQKQKWT | QVNPSPSCRC | STREKLTMLP |
1550:
ECPEGAGGLP | PPQRTQRSTE | ILQDLTDRNI | SDFLVKTYPA | LIRSSLKSKF |
1600:
WVNEQRYGGI | SIGGKLPVVP | ITGEALVGFL | SDLGRIMNVS | GGPITREASK |
1650:
EIPDFLKHLE | TEDNIKVWFN | NKGWHALVSF | LNVAHNAILR | ASLPKDRSPE |
1700:
EYGITVISQP | LNLTKEQLSE | ITVLTTSVDA | VVAICVIFSM | SFVPASFVLY |
1750:
LIQERVNKSK | HLQFISGVSP | TTYWVTNFLW | DIMNYSVSAG | LVVGIFIGFQ |
1800:
KKAYTSPENL | PALVALLLLY | GWAVIPMMYP | ASFLFDVPST | AYVALSCANL |
1850:
FIGINSSAIT | FILELFENNR | TLLRFNAVLR | KLLIVFPHFC | LGRGLIDLAL |
1900:
SQAVTDVYAR | FGEEHSANPF | HWDLIGKNLF | AMVVEGVVYF | LLTLLVQRHF |
1950:
FLSQWIAEPT | KEPIVDEDDD | VAEERQRIIT | GGNKTDILRL | HELTKIYPGT |
2000:
SSPAVDRLCV | GVRPGECFGL | LGVNGAGKTT | TFKMLTGDTT | VTSGDATVAG |
2050:
KSILTNISEV | HQNMGYCPQF | DAIDELLTGR | EHLYLYARLR | GVPAEEIEKV |
2100:
ANWSIKSLGL | TVYADCLAGT | YSGGNKRKLS | TAIALIGCPP | LVLLDEPTTG |
2150:
MDPQARRMLW | NVIVSIIREG | RAVVLTSHSM | EECEALCTRL | AIMVKGAFRC |
2200:
MGTIQHLKSK | FGDGYIVTMK | IKSPKDDLLP | DLNPVEQFFQ | GNFPGSVQRE |
2250:
RHYNMLQFQV | SSSSLARIFQ | LLLSHKDSLL | IEEYSVTQTT | LDQVFVNFAK |
2273:
QQTESHDLPL | HPRAAGASRQ | AQD

Vaild Sequence:
Related Databases
Uniprot: