ID SPCS3_CAEEL Reviewed; 180 AA. AC P34525; DT 01-FEB-1994, integrated into UniProtKB/Swiss-Prot. DT 01-FEB-1994, sequence version 1. DT 22-FEB-2023, entry version 140. DE RecName: Full=Signal peptidase complex subunit 3; DE AltName: Full=Microsomal signal peptidase 22 kDa subunit; DE Short=SPC22; DE Short=SPase 22 kDa subunit; GN Name=spcs-3 {ECO:0000312|WormBase:K12H4.4}; GN ORFNames=K12H4.4 {ECO:0000312|WormBase:K12H4.4}; OS Caenorhabditis elegans. OC Eukaryota; Metazoa; Ecdysozoa; Nematoda; Chromadorea; Rhabditida; OC Rhabditina; Rhabditomorpha; Rhabditoidea; Rhabditidae; Peloderinae; OC Caenorhabditis. OX NCBI_TaxID=6239; RN [1] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=Bristol N2; RX PubMed=7906398; DOI=10.1038/368032a0; RA Wilson R., Ainscough R., Anderson K., Baynes C., Berks M., Bonfield J., RA Burton J., Connell M., Copsey T., Cooper J., Coulson A., Craxton M., RA Dear S., Du Z., Durbin R., Favello A., Fraser A., Fulton L., Gardner A., RA Green P., Hawkins T., Hillier L., Jier M., Johnston L., Jones M., RA Kershaw J., Kirsten J., Laisster N., Latreille P., Lightning J., Lloyd C., RA Mortimore B., O'Callaghan M., Parsons J., Percy C., Rifken L., Roopra A., RA Saunders D., Shownkeen R., Sims M., Smaldon N., Smith A., Smith M., RA Sonnhammer E., Staden R., Sulston J., Thierry-Mieg J., Thomas K., RA Vaudin M., Vaughan K., Waterston R., Watson A., Weinstock L., RA Wilkinson-Sproat J., Wohldman P.; RT "2.2 Mb of contiguous nucleotide sequence from chromosome III of C. RT elegans."; RL Nature 368:32-38(1994). RN [2] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=Bristol N2; RX PubMed=9851916; DOI=10.1126/science.282.5396.2012; RG The C. elegans sequencing consortium; RT "Genome sequence of the nematode C. elegans: a platform for investigating RT biology."; RL Science 282:2012-2018(1998). RN [3] RP GLYCOSYLATION [LARGE SCALE ANALYSIS] AT ASN-141, AND IDENTIFICATION BY MASS RP SPECTROMETRY. RX PubMed=15888633; DOI=10.1093/glycob/cwi075; RA Fan X., She Y.-M., Bagshaw R.D., Callahan J.W., Schachter H., Mahuran D.J.; RT "Identification of the hydrophobic glycoproteins of Caenorhabditis RT elegans."; RL Glycobiology 15:952-964(2005). CC -!- FUNCTION: Essential component of the signal peptidase complex (SPC) CC which catalyzes the cleavage of N-terminal signal sequences from CC nascent proteins as they are translocated into the lumen of the CC endoplasmic reticulum (By similarity). Essential for the SPC catalytic CC activity, possibly by stabilizing and positioning the active center of CC the complex close to the lumenal surface (By similarity). CC {ECO:0000250|UniProtKB:P61009, ECO:0000250|UniProtKB:Q12133}. CC -!- SUBUNIT: Component of the signal peptidase complex (SPC) composed of a CC catalytic subunit sec-11 and three accessory subunits spcs-1, spcs-2 CC and spcs-3. The complex induces a local thinning of the ER membrane CC which is used to measure the length of the signal peptide (SP) h-region CC of protein substrates. This ensures the selectivity of the complex CC towards h-regions shorter than 18-20 amino acids. CC {ECO:0000250|UniProtKB:P61009}. CC -!- SUBCELLULAR LOCATION: Endoplasmic reticulum membrane CC {ECO:0000250|UniProtKB:P61008}; Single-pass type II membrane protein CC {ECO:0000250|UniProtKB:P61008}. CC -!- SIMILARITY: Belongs to the SPCS3 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; BX284603; CCD71196.1; -; Genomic_DNA. DR PIR; S44854; S44854. DR RefSeq; NP_498755.1; NM_066354.4. DR AlphaFoldDB; P34525; -. DR SMR; P34525; -. DR BioGRID; 41339; 3. DR IntAct; P34525; 1. DR STRING; 6239.K12H4.4; -. DR MEROPS; X45.001; -. DR GlyCosmos; P34525; 1 site, No reported glycans. DR iPTMnet; P34525; -. DR EPD; P34525; -. DR PaxDb; P34525; -. DR PeptideAtlas; P34525; -. DR EnsemblMetazoa; K12H4.4.1; K12H4.4.1; WBGene00019679. DR GeneID; 176133; -. DR KEGG; cel:CELE_K12H4.4; -. DR UCSC; K12H4.4.1; c. elegans. DR AGR; WB:WBGene00019679; -. DR CTD; 176133; -. DR WormBase; K12H4.4; CE00269; WBGene00019679; spcs-3. DR eggNOG; KOG3372; Eukaryota. DR GeneTree; ENSGT00940000169388; -. DR HOGENOM; CLU_068714_1_0_1; -. DR InParanoid; P34525; -. DR OMA; FGCFVTT; -. DR OrthoDB; 886088at2759; -. DR PhylomeDB; P34525; -. DR BRENDA; 3.4.21.89; 1045. DR PRO; PR:P34525; -. DR Proteomes; UP000001940; Chromosome III. DR Bgee; WBGene00019679; Expressed in embryo and 4 other tissues. DR GO; GO:0005787; C:signal peptidase complex; IBA:GO_Central. DR GO; GO:0045047; P:protein targeting to ER; IBA:GO_Central. DR GO; GO:0006465; P:signal peptide processing; IBA:GO_Central. DR InterPro; IPR007653; SPC3. DR PANTHER; PTHR12804; MICROSOMAL SIGNAL PEPTIDASE 23 KD SUBUNIT SPC22/23; 1. DR PANTHER; PTHR12804:SF0; SIGNAL PEPTIDASE COMPLEX SUBUNIT 3; 1. DR Pfam; PF04573; SPC22; 1. DR PIRSF; PIRSF016089; SPC22; 1. PE 1: Evidence at protein level; KW Endoplasmic reticulum; Glycoprotein; Membrane; Reference proteome; KW Signal-anchor; Transmembrane; Transmembrane helix. FT CHAIN 1..180 FT /note="Signal peptidase complex subunit 3" FT /id="PRO_0000218943" FT TOPO_DOM 1..12 FT /note="Cytoplasmic" FT /evidence="ECO:0000250|UniProtKB:P61008" FT TRANSMEM 13..33 FT /note="Helical; Signal-anchor for type II membrane protein" FT /evidence="ECO:0000255" FT TOPO_DOM 34..180 FT /note="Lumenal" FT /evidence="ECO:0000250|UniProtKB:P61008" FT CARBOHYD 141 FT /note="N-linked (GlcNAc...) asparagine" FT /evidence="ECO:0000269|PubMed:15888633" SQ SEQUENCE 180 AA; 20687 MW; 4CAEB791F3374EB8 CRC64; MHNLLSRANA LLAFTLWVMA AVTAACFLST VFLDYTVPTK LTVNDVKVRN VVDYATDEQQ ADLATLNFNL KVDFSKIFNW NVKQLFVYLV AEYKSKVNEV NQVVLWDRIV ERADRVVMDE IGVKSKYYFL DDGTNLLNHK NVTFVLRYNV IPNSGYLRLV QSSDQVVVPF PTTYTTTRRS //