ID A0A4W3JB30_CALMI Unreviewed; 153 AA.
AC A0A4W3JB30;
DT 18-SEP-2019, integrated into UniProtKB/TrEMBL.
DT 18-SEP-2019, sequence version 1.
DT 04-NOV-2026, entry version 31.
DE RecName: Full=ORM1-like protein {ECO:0000256|PIRNR:PIRNR018147};
GN Name=LOC103189460 {ECO:0000313|Ensembl:ENSCMIP00000029585.1};
OS Callorhinchus milii (Ghost shark).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Chondrichthyes;
OC Holocephali; Chimaeriformes; Callorhinchidae; Callorhinchus.
OX NCBI_TaxID=7868 {ECO:0000313|Ensembl:ENSCMIP00000029585.1, ECO:0000313|Proteomes:UP000314986};
RN [1] {ECO:0000313|Proteomes:UP000314986}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=17185593; DOI=10.1126/science.1130708;
RA Venkatesh B., Kirkness E.F., Loh Y.H., Halpern A.L., Lee A.P., Johnson J.,
RA Dandona N., Viswanathan L.D., Tay A., Venter J.C., Strausberg R.L.,
RA Brenner S.;
RT "Ancient noncoding elements conserved in the human genome.";
RL Science 314:1892-1892(2006).
RN [2] {ECO:0000313|Proteomes:UP000314986}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=17407382;
RA Venkatesh B., Kirkness E.F., Loh Y.H., Halpern A.L., Lee A.P., Johnson J.,
RA Dandona N., Viswanathan L.D., Tay A., Venter J.C., Strausberg R.L.,
RA Brenner S.;
RT "Survey sequencing and comparative analysis of the elephant shark
RT (Callorhinchus milii) genome.";
RL PLoS Biol. 5:E101-E101(2007).
RN [3] {ECO:0000313|Proteomes:UP000314986}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=24402279; DOI=10.1038/nature12826;
RG International Elephant Shark Genome Sequencing Consortium;
RA Venkatesh B., Lee A.P., Ravi V., Maurya A.K., Lian M.M., Swann J.B.,
RA Ohta Y., Flajnik M.F., Sutoh Y., Kasahara M., Hoon S., Gangu V., Roy S.W.,
RA Irimia M., Korzh V., Kondrychyn I., Lim Z.W., Tay B.H., Tohari S.,
RA Kong K.W., Ho S., Lorente-Galdos B., Quilez J., Marques-Bonet T.,
RA Raney B.J., Ingham P.W., Tay A., Hillier L.W., Minx P., Boehm T.,
RA Wilson R.K., Brenner S., Warren W.C.;
RT "Elephant shark genome provides unique insights into gnathostome
RT evolution.";
RL Nature 505:174-179(2014).
RN [4] {ECO:0000313|Ensembl:ENSCMIP00000029585.1}
RP IDENTIFICATION.
RG Ensembl;
RL Submitted (AUG-2025) to UniProtKB.
RN [5] {ECO:0000313|Ensembl:ENSCMIP00000029585.1}
RP IDENTIFICATION.
RG Ensembl;
RL Submitted (SEP-2025) to UniProtKB.
CC -!- FUNCTION: Plays an essential role in the homeostatic regulation of
CC sphingolipid de novo biosynthesis by modulating the activity of the
CC serine palmitoyltransferase (SPT) in response to ceramide levels. When
CC complexed to SPT, the binding of ceramides to its N-terminus stabilizes
CC a conformation that block SPT substrate entry, hence preventing SPT
CC catalytic activity. Through this mechanism, maintains ceramide levels
CC at sufficient concentrations for the production of complex
CC sphingolipids, but which prevents the accumulation of ceramides to
CC levels that trigger apoptosis. {ECO:0000256|ARBA:ARBA00045896}.
CC -!- SUBUNIT: Ceramide-sensitive subunit of the serine palmitoyltransferase
CC (SPT) complex, which is also composed of SPTLC1, SPTLC2/3 and SPTSSA/B.
CC {ECO:0000256|ARBA:ARBA00038646}.
CC -!- SUBCELLULAR LOCATION: Membrane {ECO:0000256|ARBA:ARBA00004141}; Multi-
CC pass membrane protein {ECO:0000256|ARBA:ARBA00004141}.
CC -!- SIMILARITY: Belongs to the ORM family. {ECO:0000256|ARBA:ARBA00007649,
CC ECO:0000256|PIRNR:PIRNR018147}.
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DR RefSeq; XP_007908062.1; XM_007909871.1.
DR AlphaFoldDB; A0A4W3JB30; -.
DR STRING; 7868.ENSCMIP00000029585; -.
DR Ensembl; ENSCMIT00000030051.1; ENSCMIP00000029585.1; ENSCMIG00000012786.1.
DR GeneID; 103189460; -.
DR KEGG; cmk:103189460; -.
DR GeneTree; ENSGT00950000183178; -.
DR InParanoid; A0A4W3JB30; -.
DR OMA; AAWCFSQ; -.
DR OrthoDB; 1932233at2759; -.
DR Proteomes; UP000314986; Unassembled WGS sequence.
DR GO; GO:0005789; C:endoplasmic reticulum membrane; IEA:InterPro.
DR GO; GO:0006672; P:ceramide metabolic process; IEA:UniProtKB-UniRule.
DR GO; GO:2000303; P:regulation of ceramide biosynthetic process; IEA:UniProtKB-UniRule.
DR InterPro; IPR007203; ORMDL.
DR PANTHER; PTHR12665; ORMDL PROTEINS; 1.
DR Pfam; PF04061; ORMDL; 1.
DR PIRSF; PIRSF018147; ORMDL; 1.
PE 3: Inferred from homology;
KW Endoplasmic reticulum {ECO:0000256|PIRNR:PIRNR018147};
KW Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|PIRNR:PIRNR018147};
KW Reference proteome {ECO:0000313|Proteomes:UP000314986};
KW Transmembrane {ECO:0000256|ARBA:ARBA00022692, ECO:0000256|SAM:Phobius};
KW Transmembrane helix {ECO:0000256|ARBA:ARBA00022989,
KW ECO:0000256|SAM:Phobius}.
FT TRANSMEM 23..51
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
SQ SEQUENCE 153 AA; 17585 MW; 1EF7A54C6CC7C10E CRC64;
MNVGTAHSEV NPNTRVMNSR GIWLSYILGI GLLHIILLSI PFFSVPVVWT LTNIIHNMGM
YIFLHTVKGT PFETPDQGKA RLLTHWEQMD YGVQFTASRK FLTITPIILY FLTSFYTKYD
KLHFVINTIS LMSVLIPKLP QLHGVRIFGI NKY
//
