C1QBP_CHLAE
ID C1QBP_CHLAE Reviewed; 282 AA.
AC Q9MZE0; Q95J15;
DT 30-MAY-2006, integrated into UniProtKB/Swiss-Prot.
DT 30-MAY-2006, sequence version 2.
DT 25-MAY-2022, entry version 76.
DE RecName: Full=Complement component 1 Q subcomponent-binding protein, mitochondrial;
DE AltName: Full=Globular head receptor of C1 complement protein;
DE AltName: Full=Mitochondrial matrix protein p32;
DE Flags: Precursor;
GN Name=C1QBP;
OS Chlorocebus aethiops (Green monkey) (Cercopithecus aethiops).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini;
OC Cercopithecidae; Cercopithecinae; Chlorocebus.
OX NCBI_TaxID=9534;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA], SUBCELLULAR LOCATION, AND INTERACTION WITH
RP RUBELLA VIRUS CAPSID.
RX PubMed=10823864; DOI=10.1128/jvi.74.12.5569-5576.2000;
RA Beatch M.D., Hobman T.C.;
RT "Rubella virus capsid associates with host cell protein p32 and localizes
RT to mitochondria.";
RL J. Virol. 74:5569-5576(2000).
RN [2]
RP NUCLEOTIDE SEQUENCE [MRNA].
RA Krishna Mohan K.V., Atreya C.D.;
RT "Complete coding sequence analysis of simian homolog of gC1Q-R.";
RL Submitted (JUN-2000) to the EMBL/GenBank/DDBJ databases.
RN [3]
RP PROTEIN SEQUENCE OF 155-170, FUNCTION (MICROBIAL INFECTION), INTERACTION
RP WITH L.MONOCYTOGENES INLB, AND SUBCELLULAR LOCATION.
RX PubMed=10747014; DOI=10.1093/emboj/19.7.1458;
RA Braun L., Ghebrehiwet B., Cossart P.;
RT "gC1q-R/p32, a C1q-binding protein, is a receptor for the InlB invasion
RT protein of Listeria monocytogenes.";
RL EMBO J. 19:1458-1466(2000).
CC -!- FUNCTION: Is believed to be a multifunctional and multicompartmental
CC protein involved in inflammation and infection processes, ribosome
CC biogenesis, protein synthesis in mitochondria, regulation of apoptosis,
CC transcriptional regulation and pre-mRNA splicing. At the cell surface
CC is thought to act as an endothelial receptor for plasma proteins of the
CC complement and kallikrein-kinin cascades. Putative receptor for C1q;
CC specifically binds to the globular 'heads' of C1q thus inhibiting C1;
CC may perform the receptor function through a complex with C1qR/CD93. In
CC complex with cytokeratin-1/KRT1 is a high affinity receptor for
CC kininogen-1/HMWK. Can also bind other plasma proteins, such as
CC coagulation factor XII leading to its autoactivation. May function to
CC bind initially fluid kininogen-1 to the cell membrane. The secreted
CC form may enhance both extrinsic and intrinsic coagulation pathways. It
CC is postulated that the cell surface form requires docking with
CC transmembrane proteins for downstream signaling which might be specific
CC for a cell-type or response. By acting as C1q receptor is involved in
CC chemotaxis of immature dendritic cells and neutrophils and is proposed
CC to signal through CD209/DC-SIGN on immature dendritic cells, through
CC integrin alpha-4/beta-1 during trophoblast invasion of the decidua, and
CC through integrin beta-1 during endothelial cell adhesion and spreading.
CC Signaling involved in inhibition of innate immune response is
CC implicating the PI3K-AKT/PKB pathway. Required for protein synthesis in
CC mitochondria. In mitochondrial translation may be involved in formation
CC of functional 55S mitoribosomes; the function seems to involve its RNA-
CC binding activity. May be involved in the nucleolar ribosome maturation
CC process; the function may involve the exchange of FBL for RRP1 in the
CC association with pre-ribosome particles. Involved in regulation of RNA
CC splicing by inhibiting the RNA-binding capacity of SRSF1 and its
CC phosphorylation. Is required for the nuclear translocation of splicing
CC factor U2AF1L4. Involved in regulation of CDKN2A- and HRK-mediated
CC apoptosis. May be involved in regulation of FOXC1 transcriptional
CC activity and NFY/CCAAT-binding factor complex-mediated transcription.
CC May play a role in antibacterial defense.
CC {ECO:0000250|UniProtKB:Q07021}.
CC -!- FUNCTION: (Microbial infection) During bacterial infection processes
CC acts as an attachment site for microbial proteins, including Listeria
CC monocytogenes internalin B (InlB). {ECO:0000269|PubMed:10747014}.
CC -!- SUBUNIT: Homotrimer; three monomers form a donut-shaped structure with
CC an unusually asymmetric charge distribution on the surface. Interacts
CC with CDK13, HRK, VTN, NFYB, ADRA1B, FOXC1, DDX21, DDX50, NCL, SRSF1 and
CC SRSF9. Interacts with CD93; the association may represent a cell
CC surface C1q receptor. Interacts with KRT1; the association represents a
CC cell surface kininogen receptor. Interacts with CD209; the interaction
CC is indicative for a C1q:C1QBP:CD209 signaling complex. Interacts with
CC FBL and RRP1; the respective interactions with C1QBP are competitive.
CC Probably associates with the mitoribosome. Interacts with MAVS; the
CC interaction occurs upon viral transfection. Interacts with PPIF.
CC Interacts with U2AF1L4. Interacts with PLEKHN1. Interacts with VGF-
CC derived peptide TLQP-21. {ECO:0000250|UniProtKB:O35658,
CC ECO:0000250|UniProtKB:O35796, ECO:0000250|UniProtKB:Q07021}.
CC -!- SUBUNIT: (Microbial infection) Interacts with Rubella virus capsid
CC protein; the interaction occurs in mitochondria.
CC {ECO:0000269|PubMed:10823864}.
CC -!- SUBUNIT: (Microbial infection) Interacts with L.monocytogenes InlB.
CC {ECO:0000269|PubMed:10747014}.
CC -!- INTERACTION:
CC Q9MZE0; P0DQD2: inlB; Xeno; NbExp=3; IntAct=EBI-6375765, EBI-1379295;
CC Q9MZE0; PRO_0000240177 [O40955]; Xeno; NbExp=5; IntAct=EBI-6375765, EBI-6383633;
CC Q9MZE0; PRO_0000041308 [P07566]; Xeno; NbExp=3; IntAct=EBI-6375765, EBI-6377932;
CC -!- SUBCELLULAR LOCATION: Mitochondrion matrix
CC {ECO:0000269|PubMed:10823864}. Nucleus {ECO:0000250|UniProtKB:Q07021}.
CC Cell membrane {ECO:0000269|PubMed:10747014}; Peripheral membrane
CC protein {ECO:0000250|UniProtKB:Q07021}; Extracellular side
CC {ECO:0000250|UniProtKB:Q07021}. Secreted
CC {ECO:0000250|UniProtKB:Q07021}. Cytoplasm
CC {ECO:0000250|UniProtKB:Q07021}. Nucleus, nucleolus
CC {ECO:0000250|UniProtKB:Q07021}. Note=Seems to be predominantly
CC localized to mitochondria. Secreted by activated lymphocytes.
CC {ECO:0000250|UniProtKB:Q07021}.
CC -!- SIMILARITY: Belongs to the MAM33 family. {ECO:0000305}.
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DR EMBL; AF238300; AAF74122.1; -; mRNA.
DR EMBL; AF283278; AAK83694.1; -; mRNA.
DR EMBL; AF283279; AAK83695.1; -; mRNA.
DR AlphaFoldDB; Q9MZE0; -.
DR SMR; Q9MZE0; -.
DR IntAct; Q9MZE0; 4.
DR GO; GO:0005737; C:cytoplasm; ISS:UniProtKB.
DR GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR GO; GO:0005759; C:mitochondrial matrix; IEA:UniProtKB-SubCell.
DR GO; GO:0005730; C:nucleolus; IEA:UniProtKB-SubCell.
DR GO; GO:0005634; C:nucleus; ISS:UniProtKB.
DR GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0031690; F:adrenergic receptor binding; ISS:UniProtKB.
DR GO; GO:0001849; F:complement component C1q complex binding; ISS:UniProtKB.
DR GO; GO:0005540; F:hyaluronic acid binding; ISS:UniProtKB.
DR GO; GO:0030984; F:kininogen binding; ISS:UniProtKB.
DR GO; GO:0097177; F:mitochondrial ribosome binding; ISS:UniProtKB.
DR GO; GO:0003729; F:mRNA binding; ISS:UniProtKB.
DR GO; GO:0003714; F:transcription corepressor activity; ISS:UniProtKB.
DR GO; GO:0006915; P:apoptotic process; IEA:UniProtKB-KW.
DR GO; GO:0006958; P:complement activation, classical pathway; IEA:UniProtKB-KW.
DR GO; GO:0045087; P:innate immune response; IEA:UniProtKB-KW.
DR GO; GO:0042256; P:mature ribosome assembly; ISS:UniProtKB.
DR GO; GO:0006397; P:mRNA processing; IEA:UniProtKB-KW.
DR GO; GO:0050687; P:negative regulation of defense response to virus; ISS:UniProtKB.
DR GO; GO:0032689; P:negative regulation of interferon-gamma production; ISS:UniProtKB.
DR GO; GO:0032695; P:negative regulation of interleukin-12 production; ISS:UniProtKB.
DR GO; GO:0039534; P:negative regulation of MDA-5 signaling pathway; ISS:UniProtKB.
DR GO; GO:0048025; P:negative regulation of mRNA splicing, via spliceosome; ISS:UniProtKB.
DR GO; GO:0039536; P:negative regulation of RIG-I signaling pathway; ISS:UniProtKB.
DR GO; GO:0000122; P:negative regulation of transcription by RNA polymerase II; ISS:UniProtKB.
DR GO; GO:0014065; P:phosphatidylinositol 3-kinase signaling; ISS:UniProtKB.
DR GO; GO:0043065; P:positive regulation of apoptotic process; ISS:UniProtKB.
DR GO; GO:0045785; P:positive regulation of cell adhesion; ISS:UniProtKB.
DR GO; GO:2000510; P:positive regulation of dendritic cell chemotaxis; ISS:UniProtKB.
DR GO; GO:0070131; P:positive regulation of mitochondrial translation; ISS:UniProtKB.
DR GO; GO:0090023; P:positive regulation of neutrophil chemotaxis; ISS:UniProtKB.
DR GO; GO:0051897; P:positive regulation of protein kinase B signaling; ISS:UniProtKB.
DR GO; GO:1900026; P:positive regulation of substrate adhesion-dependent cell spreading; ISS:UniProtKB.
DR GO; GO:1901165; P:positive regulation of trophoblast cell migration; ISS:UniProtKB.
DR GO; GO:0030449; P:regulation of complement activation; ISS:UniProtKB.
DR GO; GO:0008380; P:RNA splicing; IEA:UniProtKB-KW.
DR Gene3D; 3.10.280.10; -; 1.
DR InterPro; IPR003428; MAM33.
DR InterPro; IPR036561; MAM33_sf.
DR PANTHER; PTHR10826; PTHR10826; 1.
DR Pfam; PF02330; MAM33; 1.
DR SUPFAM; SSF54529; SSF54529; 1.
PE 1: Evidence at protein level;
KW Acetylation; Adaptive immunity; Apoptosis; Cell membrane;
KW Complement pathway; Cytoplasm; Direct protein sequencing;
KW Host-virus interaction; Immunity; Innate immunity; Membrane; Mitochondrion;
KW mRNA processing; mRNA splicing; Nucleus; Phosphoprotein;
KW Ribosome biogenesis; Secreted; Transcription; Transcription regulation;
KW Transit peptide.
FT TRANSIT 1..70
FT /note="Mitochondrion"
FT /evidence="ECO:0000250"
FT CHAIN 71..282
FT /note="Complement component 1 Q subcomponent-binding
FT protein, mitochondrial"
FT /id="PRO_0000238677"
FT REGION 76..93
FT /note="C1q binding"
FT /evidence="ECO:0000250"
FT REGION 137..163
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 168..213
FT /note="Interaction with MAVS"
FT /evidence="ECO:0000250"
FT MOD_RES 91
FT /note="N6-acetyllysine"
FT /evidence="ECO:0000250|UniProtKB:Q07021"
FT MOD_RES 188
FT /note="Phosphotyrosine"
FT /evidence="ECO:0000250|UniProtKB:Q07021"
FT MOD_RES 201
FT /note="Phosphoserine"
FT /evidence="ECO:0000250|UniProtKB:Q07021"
FT MOD_RES 205
FT /note="Phosphoserine"
FT /evidence="ECO:0000250|UniProtKB:Q07021"
FT CONFLICT 21
FT /note="A -> P (in Ref. 1; AAF74122)"
FT /evidence="ECO:0000305"
FT CONFLICT 176
FT /note="Missing (in Ref. 2; AAK83694/AAK83695)"
FT /evidence="ECO:0000305"
SQ SEQUENCE 282 AA; 31416 MW; 67526590A80F5177 CRC64;
MLPLLRCVPR VLGSAVPSLR AAAPASPFRQ LLTPGPRLCA RPFGLLSVRA GSERRPGLLR
PRGPCACGCG CGLLHTEGDK AFVDFLNDEI KEERKIQKHK TLPKMSGGWE LELNGTEAKL
MRKVAGEKIT VTFNINNSIP PTFDGEEEPT QGQKVEEQEP ELTSTPNFVV EVIKNDDGKK
ALVLDCHYPE DEVGQEDEAE SDIFSIREVS FQSSGESEWK DTNYTLNTDS LDWALYDHLM
DFLADRGVDN TFADELVELS TALEHQEYIS FLEDLKSFVK SQ
