ID LRAD4_HUMAN Reviewed; 306 AA. AC O15165; B3KNT9; E9PAY9; K7EN38; O15166; O15167; O15168; Q5U646; Q6NXP3; DT 24-JAN-2001, integrated into UniProtKB/Swiss-Prot. DT 01-JAN-1998, sequence version 1. DT 24-JAN-2024, entry version 180. DE RecName: Full=Low-density lipoprotein receptor class A domain-containing protein 4; GN Name=LDLRAD4; Synonyms=C18orf1; OS Homo sapiens (Human). OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; OC Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; OC Homo. OX NCBI_TaxID=9606; RN [1] RP NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS ALPHA-1; ALPHA-2; BETA-1 AND BETA-2). RC TISSUE=Brain; RX PubMed=9479497; DOI=10.1006/geno.1997.5118; RA Yoshikawa T., Sanders A.R., Esterling L.E., Detera-Wadleigh S.D.; RT "Multiple transcriptional variants and RNA editing in C18orf1, a novel gene RT with LDLRA and transmembrane domains on 18p11.2."; RL Genomics 47:246-257(1998). RN [2] RP NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 6). RC TISSUE=Brain; RX PubMed=14702039; DOI=10.1038/ng1285; RA Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R., RA Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H., RA Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S., RA Yamamoto J., Saito K., Kawai Y., Isono Y., Nakamura Y., Nagahari K., RA Murakami K., Yasuda T., Iwayanagi T., Wagatsuma M., Shiratori A., Sudo H., RA Hosoiri T., Kaku Y., Kodaira H., Kondo H., Sugawara M., Takahashi M., RA Kanda K., Yokoi T., Furuya T., Kikkawa E., Omura Y., Abe K., Kamihara K., RA Katsuta N., Sato K., Tanikawa M., Yamazaki M., Ninomiya K., Ishibashi T., RA Yamashita H., Murakawa K., Fujimori K., Tanai H., Kimata M., Watanabe M., RA Hiraoka S., Chiba Y., Ishida S., Ono Y., Takiguchi S., Watanabe S., RA Yosida M., Hotuta T., Kusano J., Kanehori K., Takahashi-Fujii A., Hara H., RA Tanase T.-O., Nomura Y., Togiya S., Komai F., Hara R., Takeuchi K., RA Arita M., Imose N., Musashino K., Yuuki H., Oshima A., Sasaki N., RA Aotsuka S., Yoshikawa Y., Matsunawa H., Ichihara T., Shiohata N., Sano S., RA Moriya S., Momiyama H., Satoh N., Takami S., Terashima Y., Suzuki O., RA Nakagawa S., Senoh A., Mizoguchi H., Goto Y., Shimizu F., Wakebe H., RA Hishigaki H., Watanabe T., Sugiyama A., Takemoto M., Kawakami B., RA Yamazaki M., Watanabe K., Kumagai A., Itakura S., Fukuzumi Y., Fujimori Y., RA Komiyama M., Tashiro H., Tanigami A., Fujiwara T., Ono T., Yamada K., RA Fujii Y., Ozaki K., Hirao M., Ohmori Y., Kawabata A., Hikiji T., RA Kobatake N., Inagaki H., Ikema Y., Okamoto S., Okitani R., Kawakami T., RA Noguchi S., Itoh T., Shigeta K., Senba T., Matsumura K., Nakajima Y., RA Mizuno T., Morinaga M., Sasaki M., Togashi T., Oyama M., Hata H., RA Watanabe M., Komatsu T., Mizushima-Sugano J., Satoh T., Shirai Y., RA Takahashi Y., Nakagawa K., Okumura K., Nagase T., Nomura N., Kikuchi H., RA Masuho Y., Yamashita R., Nakai K., Yada T., Nakamura Y., Ohara O., RA Isogai T., Sugano S.; RT "Complete sequencing and characterization of 21,243 full-length human RT cDNAs."; RL Nat. Genet. 36:40-45(2004). RN [3] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RX PubMed=16177791; DOI=10.1038/nature03983; RA Nusbaum C., Zody M.C., Borowsky M.L., Kamal M., Kodira C.D., Taylor T.D., RA Whittaker C.A., Chang J.L., Cuomo C.A., Dewar K., FitzGerald M.G., Yang X., RA Abouelleil A., Allen N.R., Anderson S., Bloom T., Bugalter B., Butler J., RA Cook A., DeCaprio D., Engels R., Garber M., Gnirke A., Hafez N., Hall J.L., RA Norman C.H., Itoh T., Jaffe D.B., Kuroki Y., Lehoczky J., Lui A., RA Macdonald P., Mauceli E., Mikkelsen T.S., Naylor J.W., Nicol R., Nguyen C., RA Noguchi H., O'Leary S.B., Piqani B., Smith C.L., Talamas J.A., Topham K., RA Totoki Y., Toyoda A., Wain H.M., Young S.K., Zeng Q., Zimmer A.R., RA Fujiyama A., Hattori M., Birren B.W., Sakaki Y., Lander E.S.; RT "DNA sequence and analysis of human chromosome 18."; RL Nature 437:551-555(2005). RN [4] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RA Mural R.J., Istrail S., Sutton G.G., Florea L., Halpern A.L., Mobarry C.M., RA Lippert R., Walenz B., Shatkay H., Dew I., Miller J.R., Flanigan M.J., RA Edwards N.J., Bolanos R., Fasulo D., Halldorsson B.V., Hannenhalli S., RA Turner R., Yooseph S., Lu F., Nusskern D.R., Shue B.C., Zheng X.H., RA Zhong F., Delcher A.L., Huson D.H., Kravitz S.A., Mouchard L., Reinert K., RA Remington K.A., Clark A.G., Waterman M.S., Eichler E.E., Adams M.D., RA Hunkapiller M.W., Myers E.W., Venter J.C.; RL Submitted (SEP-2005) to the EMBL/GenBank/DDBJ databases. RN [5] RP NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORMS ALPHA-2; 5 AND 8). RC TISSUE=Brain; RX PubMed=15489334; DOI=10.1101/gr.2596504; RG The MGC Project Team; RT "The status, quality, and expansion of the NIH full-length cDNA project: RT the Mammalian Gene Collection (MGC)."; RL Genome Res. 14:2121-2127(2004). RN [6] RP NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 6-251 (ISOFORM 7). RC TISSUE=Testis; RA Ebert L., Heil O., Hennig S., Neubert P., Partsch E., Peters M., RA Radelof U., Schneider D., Korn B.; RL Submitted (DEC-2002) to the EMBL/GenBank/DDBJ databases. RN [7] RP TISSUE SPECIFICITY. RX PubMed=19461657; DOI=10.1038/jhg.2009.47; RA Meerabux J.M., Ohba H., Iwayama Y., Maekawa M., Detera-Wadleigh S.D., RA DeLisi L.E., Yoshikawa T.; RT "Analysis of a t(18;21)(p11.1;p11.1) translocation in a family with RT schizophrenia."; RL J. Hum. Genet. 54:386-391(2009). RN [8] RP FUNCTION, INTERACTION WITH PMEPA1; SMAD2 AND SMAD3, SUBCELLULAR LOCATION, RP AND MOTIF. RX PubMed=24627487; DOI=10.1074/jbc.m114.558981; RA Nakano N., Maeyama K., Sakata N., Itoh F., Akatsu R., Nakata M., Katsu Y., RA Ikeno S., Togawa Y., Vo Nguyen T.T., Watanabe Y., Kato M., Itoh S.; RT "C18 ORF1, a novel negative regulator of transforming growth factor-beta RT signaling."; RL J. Biol. Chem. 289:12680-12692(2014). CC -!- FUNCTION: Functions as a negative regulator of TGF-beta signaling and CC thereby probably plays a role in cell proliferation, differentiation, CC apoptosis, motility, extracellular matrix production and CC immunosuppression. In the canonical TGF-beta pathway, ZFYVE9/SARA CC recruits the intracellular signal transducer and transcriptional CC modulators SMAD2 and SMAD3 to the TGF-beta receptor. Phosphorylated by CC the receptor, SMAD2 and SMAD3 then form a heteromeric complex with CC SMAD4 that translocates to the nucleus to regulate transcription. CC Through interaction with SMAD2 and SMAD3, LDLRAD4 may compete with CC ZFYVE9 and SMAD4 and prevent propagation of the intracellular signal. CC {ECO:0000269|PubMed:24627487}. CC -!- SUBUNIT: Interacts with PMEPA1. Interacts (via the SMAD interaction CC motif) with SMAD2 and SMAD3. {ECO:0000269|PubMed:24627487}. CC -!- INTERACTION: CC O15165-2; O43681: GET3; NbExp=3; IntAct=EBI-13302279, EBI-2515857; CC O15165-2; O43765: SGTA; NbExp=3; IntAct=EBI-13302279, EBI-347996; CC O15165-2; Q8N966: ZDHHC22; NbExp=3; IntAct=EBI-13302279, EBI-10268111; CC -!- SUBCELLULAR LOCATION: Early endosome membrane CC {ECO:0000269|PubMed:24627487}; Single-pass membrane protein CC {ECO:0000269|PubMed:24627487}. CC -!- ALTERNATIVE PRODUCTS: CC Event=Alternative splicing; Named isoforms=8; CC Name=Alpha-1; CC IsoId=O15165-1; Sequence=Displayed; CC Name=Alpha-2; CC IsoId=O15165-2; Sequence=VSP_006440; CC Name=Beta-1; CC IsoId=O15165-3; Sequence=VSP_006439; CC Name=Beta-2; CC IsoId=O15165-4; Sequence=VSP_006439, VSP_006440; CC Name=5; CC IsoId=O15165-5; Sequence=VSP_013901; CC Name=6; CC IsoId=O15165-6; Sequence=VSP_043253; CC Name=7; CC IsoId=O15165-7; Sequence=VSP_043253, VSP_006440; CC Name=8; CC IsoId=O15165-8; Sequence=VSP_054772; CC -!- TISSUE SPECIFICITY: Expressed in lymphocytes. CC {ECO:0000269|PubMed:19461657}. CC -!- DOMAIN: The SMAD interaction motif is required for interaction with CC SMAD2 and SMAD3 and the negative regulation of TGF-beta signaling. CC {ECO:0000269|PubMed:24627487}. CC -!- SIMILARITY: Belongs to the PMEPA1 family. {ECO:0000305}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; AF009424; AAC52023.1; -; mRNA. DR EMBL; AF009425; AAC52024.1; -; mRNA. DR EMBL; AF009426; AAC52025.1; -; mRNA. DR EMBL; AF009427; AAC52026.1; -; mRNA. DR EMBL; AK055028; BAG51451.1; -; mRNA. DR EMBL; AP001010; -; NOT_ANNOTATED_CDS; Genomic_DNA. DR EMBL; AP002439; -; NOT_ANNOTATED_CDS; Genomic_DNA. DR EMBL; AP002505; -; NOT_ANNOTATED_CDS; Genomic_DNA. DR EMBL; AP005131; -; NOT_ANNOTATED_CDS; Genomic_DNA. DR EMBL; CH471113; EAX01514.1; -; Genomic_DNA. DR EMBL; BC029958; -; NOT_ANNOTATED_CDS; mRNA. DR EMBL; BC030199; AAH30199.1; -; mRNA. DR EMBL; BC066971; AAH66971.1; -; mRNA. DR EMBL; BX114947; -; NOT_ANNOTATED_CDS; mRNA. DR CCDS; CCDS32793.1; -. [O15165-1] DR CCDS; CCDS32794.1; -. [O15165-2] DR CCDS; CCDS32795.1; -. [O15165-6] DR CCDS; CCDS42415.1; -. [O15165-7] DR CCDS; CCDS62392.1; -. [O15165-5] DR RefSeq; NP_001003674.1; NM_001003674.3. [O15165-6] DR RefSeq; NP_001003675.1; NM_001003675.3. [O15165-7] DR RefSeq; NP_001263178.1; NM_001276249.1. [O15165-5] DR RefSeq; NP_001263180.1; NM_001276251.1. [O15165-8] DR RefSeq; NP_852146.1; NM_181481.4. [O15165-1] DR RefSeq; NP_852147.1; NM_181482.4. [O15165-2] DR RefSeq; XP_005258197.1; XM_005258140.1. DR RefSeq; XP_006722416.1; XM_006722353.1. [O15165-1] DR RefSeq; XP_006722417.1; XM_006722354.1. [O15165-1] DR RefSeq; XP_011524040.1; XM_011525738.1. DR RefSeq; XP_016881454.1; XM_017025965.1. DR RefSeq; XP_016881455.1; XM_017025966.1. DR RefSeq; XP_016881456.1; XM_017025967.1. DR RefSeq; XP_016881457.1; XM_017025968.1. DR RefSeq; XP_016881458.1; XM_017025969.1. [O15165-5] DR RefSeq; XP_016881459.1; XM_017025970.1. [O15165-5] DR RefSeq; XP_016881460.1; XM_017025971.1. DR AlphaFoldDB; O15165; -. DR BioGRID; 107209; 58. DR IntAct; O15165; 41. DR STRING; 9606.ENSP00000352420; -. DR iPTMnet; O15165; -. DR PhosphoSitePlus; O15165; -. DR SwissPalm; O15165; -. DR BioMuta; LDLRAD4; -. DR MassIVE; O15165; -. DR PaxDb; 9606-ENSP00000352420; -. DR PeptideAtlas; O15165; -. DR ProteomicsDB; 19107; -. DR ProteomicsDB; 48486; -. [O15165-1] DR ProteomicsDB; 48487; -. [O15165-2] DR ProteomicsDB; 48488; -. [O15165-3] DR ProteomicsDB; 48489; -. [O15165-4] DR ProteomicsDB; 48490; -. [O15165-5] DR ProteomicsDB; 48491; -. [O15165-6] DR Antibodypedia; 21959; 87 antibodies from 10 providers. DR DNASU; 753; -. DR Ensembl; ENST00000359446.11; ENSP00000352420.5; ENSG00000168675.19. [O15165-1] DR Ensembl; ENST00000399848.7; ENSP00000382741.2; ENSG00000168675.19. [O15165-2] DR Ensembl; ENST00000585931.5; ENSP00000466772.1; ENSG00000168675.19. [O15165-5] DR Ensembl; ENST00000586765.1; ENSP00000474783.1; ENSG00000168675.19. [O15165-7] DR Ensembl; ENST00000587757.5; ENSP00000466178.1; ENSG00000168675.19. [O15165-6] DR Ensembl; ENST00000677744.1; ENSP00000504022.1; ENSG00000168675.19. [O15165-5] DR Ensembl; ENST00000677910.1; ENSP00000503996.1; ENSG00000168675.19. [O15165-5] DR Ensembl; ENST00000679091.1; ENSP00000503185.1; ENSG00000168675.19. [O15165-1] DR GeneID; 753; -. DR KEGG; hsa:753; -. DR MANE-Select; ENST00000359446.11; ENSP00000352420.5; NM_001378100.1; NP_001365029.1. DR UCSC; uc002ksb.4; human. [O15165-1] DR AGR; HGNC:1224; -. DR CTD; 753; -. DR DisGeNET; 753; -. DR GeneCards; LDLRAD4; -. DR HGNC; HGNC:1224; LDLRAD4. DR HPA; ENSG00000168675; Tissue enhanced (lymphoid). DR MIM; 606571; gene. DR neXtProt; NX_O15165; -. DR OpenTargets; ENSG00000168675; -. DR PharmGKB; PA25593; -. DR VEuPathDB; HostDB:ENSG00000168675; -. DR eggNOG; ENOG502QRYK; Eukaryota. DR GeneTree; ENSGT00390000000724; -. DR HOGENOM; CLU_074371_0_1_1; -. DR InParanoid; O15165; -. DR OMA; RECKFTC; -. DR OrthoDB; 5349462at2759; -. DR PhylomeDB; O15165; -. DR TreeFam; TF331681; -. DR PathwayCommons; O15165; -. DR SignaLink; O15165; -. DR BioGRID-ORCS; 753; 14 hits in 1143 CRISPR screens. DR ChiTaRS; LDLRAD4; human. DR GenomeRNAi; 753; -. DR Pharos; O15165; Tbio. DR PRO; PR:O15165; -. DR Proteomes; UP000005640; Chromosome 18. DR RNAct; O15165; Protein. DR Bgee; ENSG00000168675; Expressed in endothelial cell and 191 other cell types or tissues. DR ExpressionAtlas; O15165; baseline and differential. DR GO; GO:0031901; C:early endosome membrane; IDA:UniProtKB. DR GO; GO:0000139; C:Golgi membrane; IBA:GO_Central. DR GO; GO:0043231; C:intracellular membrane-bounded organelle; IDA:HPA. DR GO; GO:0016020; C:membrane; NAS:UniProtKB. DR GO; GO:0070412; F:R-SMAD binding; IPI:UniProtKB. DR GO; GO:0030336; P:negative regulation of cell migration; IMP:UniProtKB. DR GO; GO:0010719; P:negative regulation of epithelial to mesenchymal transition; IMP:UniProtKB. DR GO; GO:0060392; P:negative regulation of SMAD protein signal transduction; IDA:UniProtKB. DR GO; GO:0030512; P:negative regulation of transforming growth factor beta receptor signaling pathway; IDA:UniProtKB. DR CDD; cd00112; LDLa; 1. DR Gene3D; 4.10.400.10; Low-density Lipoprotein Receptor; 1. DR InterPro; IPR036055; LDL_receptor-like_sf. DR InterPro; IPR023415; LDLR_class-A_CS. DR InterPro; IPR002172; LDrepeatLR_classA_rpt. DR InterPro; IPR043445; TMEPAI/LRAD4. DR PANTHER; PTHR16514; LOW DENSITY LIPOPROTEIN RECEPTOR CLASS A DOMAIN-CONTAINING 4A; 1. DR PANTHER; PTHR16514:SF4; LOW-DENSITY LIPOPROTEIN RECEPTOR CLASS A DOMAIN-CONTAINING PROTEIN 4; 1. DR Pfam; PF00057; Ldl_recept_a; 1. DR SMART; SM00192; LDLa; 1. DR SUPFAM; SSF57424; LDL receptor-like module; 1. DR PROSITE; PS01209; LDLRA_1; 1. DR PROSITE; PS50068; LDLRA_2; 1. DR Genevisible; O15165; HS. PE 1: Evidence at protein level; KW Alternative splicing; Disulfide bond; Endosome; Membrane; KW Reference proteome; Signal transduction inhibitor; Transmembrane; KW Transmembrane helix. FT CHAIN 1..306 FT /note="Low-density lipoprotein receptor class A domain- FT containing protein 4" FT /id="PRO_0000185444" FT TOPO_DOM 1..64 FT /note="Lumenal" FT /evidence="ECO:0000255" FT TRANSMEM 65..85 FT /note="Helical" FT /evidence="ECO:0000255" FT TOPO_DOM 86..306 FT /note="Cytoplasmic" FT /evidence="ECO:0000255" FT DOMAIN 16..48 FT /note="LDL-receptor class A" FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00124" FT REGION 286..306 FT /note="Disordered" FT /evidence="ECO:0000256|SAM:MobiDB-lite" FT MOTIF 180..183 FT /note="PPxY motif 1" FT MOTIF 208..211 FT /note="SMAD interaction motif (SIM)" FT MOTIF 252..255 FT /note="PPxY motif 2" FT DISULFID 19..38 FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00124" FT DISULFID 32..47 FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00124" FT VAR_SEQ 1..111 FT /note="MPEAGFQATNAFTECKFTCTSGKCLYLGSLVCNQQNDCGDNSDEENCLLVTE FT HPPPGIFNSELEFAQIIIIVVVVTVMVVVIVCLLNHYKVSTRSFINRPNQSRRREDGLP FT -> MRLDSHLECISST (in isoform 8)" FT /evidence="ECO:0000303|PubMed:15489334" FT /id="VSP_054772" FT VAR_SEQ 1..77 FT /note="Missing (in isoform 5)" FT /evidence="ECO:0000303|PubMed:15489334" FT /id="VSP_013901" FT VAR_SEQ 1..61 FT /note="MPEAGFQATNAFTECKFTCTSGKCLYLGSLVCNQQNDCGDNSDEENCLLVTE FT HPPPGIFNS -> MSSDHLNNSTLKEAQFKDLFLKKA (in isoform 6 and FT isoform 7)" FT /evidence="ECO:0000303|PubMed:14702039, ECO:0000303|Ref.6" FT /id="VSP_043253" FT VAR_SEQ 1..61 FT /note="MPEAGFQATNAFTECKFTCTSGKCLYLGSLVCNQQNDCGDNSDEENCLLVTE FT HPPPGIFNS -> MAA (in isoform Beta-1 and isoform Beta-2)" FT /evidence="ECO:0000303|PubMed:9479497" FT /id="VSP_006439" FT VAR_SEQ 113..130 FT /note="Missing (in isoform Alpha-2, isoform Beta-2 and FT isoform 7)" FT /evidence="ECO:0000303|PubMed:15489334, FT ECO:0000303|PubMed:9479497, ECO:0000303|Ref.6" FT /id="VSP_006440" FT CONFLICT 125 FT /note="R -> Q (in Ref. 5; AAH66971)" FT /evidence="ECO:0000305" FT CONFLICT 135 FT /note="P -> T (in Ref. 5; AAH66971)" FT /evidence="ECO:0000305" FT CONFLICT 194 FT /note="P -> T (in Ref. 5; AAH66971)" FT /evidence="ECO:0000305" SQ SEQUENCE 306 AA; 33900 MW; F48EF66E329201BD CRC64; MPEAGFQATN AFTECKFTCT SGKCLYLGSL VCNQQNDCGD NSDEENCLLV TEHPPPGIFN SELEFAQIII IVVVVTVMVV VIVCLLNHYK VSTRSFINRP NQSRRREDGL PQEGCLWPSD SAAPRLGASE IMHAPRSRDR FTAPSFIQRD RFSRFQPTYP YVQHEIDLPP TISLSDGEEP PPYQGPCTLQ LRDPEQQMEL NRESVRAPPN RTIFDSDLID IAMYSGGPCP PSSNSGISAS TCSSNGRMEG PPPTYSEVMG HHPGASFLHH QRSNAHRGSR LQFQQNNAES TIVPIKGKDR KPGNLV //