P01027 (CO3_MOUSE) Reviewed, UniProtKB/Swiss-Prot
Last modified
April 3, 2013.
Version 135.
History...
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Complement C3 Alternative name(s): HSE-MSF Cleaved into the following 11 chains:
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| Gene names |
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| Organism | Mus musculus (Mouse) [Reference proteome] | ||
| Taxonomic identifier | 10090 [NCBI] | ||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Sciurognathi › Muroidea › Muridae › Murinae › Mus › Mus![]() |
Protein attributes
| Sequence length | 1663 AA. |
| Sequence status | Complete. |
| Sequence processing | The displayed sequence is further processed into a mature form. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | C3 plays a central role in the activation of the complement system. Its processing by C3 convertase is the central reaction in both classical and alternative complement pathways. After activation C3b can bind covalently, via its reactive thioester, to cell surface carbohydrates or immune aggregates. Ref.13 Ref.15 Derived from proteolytic degradation of complement C3, C3a anaphylatoxin is a mediator of local inflammatory process. It induces the contraction of smooth muscle, increases vascular permeability and causes histamine release from mast cells and basophilic leukocytes. The short isoform has B-cell stimulatory activity. Ref.13 Ref.15 Acylation stimulating protein: adipogenic hormone that stimulates triglyceride (TG) synthesis and glucose transport in adipocytes, regulating fat storage and playing a role in postprandial TG clearance. Appears to stimulate TG synthesis via activation of the PLC, MAPK and AKT signaling pathways. Ligand for GPR77. Promotes the phosphorylation, ARRB2-mediated internalization and recycling of GPR77. Ref.13 Ref.15 |
| Subunit structure | C3 precursor is first processed by the removal of 4 Arg residues, forming two chains, beta and alpha, linked by a disulfide bond. C3 convertase activates C3 by cleaving the alpha chain, releasing C3a anaphylatoxin and generating C3b (beta chain + alpha' chain). C3dg interacts with CR2 (via the N-terminal Sushi domains 1 and 2). Interacts with VSIG4. Interacts (both C3a and ASP) with GPR77; the interaction occurs with higher affinity for ASP, enhancing the phosphorylation and activation of GPR77, recruitment of ARRB2 to the cell surface and endocytosis of GRP77 By similarity. |
| Subcellular location | |
| Post-translational modification | C3b is rapidly split in two positions by factor I and a cofactor to form iC3b (inactivated C3b) and C3f which is released. Then iC3b is slowly cleaved (possibly by factor I) to form C3c (beta chain + alpha' chain fragment 1 + alpha' chain fragment 2), C3dg and C3f. Other proteases produce other fragments such as C3d or C3g. C3a is further processed by carboxypeptidases to release the C-terminal arginine residue generating the acylation stimulating protein (ASP). Levels of ASP are increased in adipocytes in the postprandial period and by dietary chylomicrons. Phosphorylation sites are present in the extracellular medium By similarity. |
| Disruption phenotype | Null mice displayed altered lipid metabolism and morphological changes in adipocyte distribution. There is reduced adipsin/CFD expression, increased number of smaller fat cells, decreased DGAT1 expression and activity, and less triglyceride storage capacity associated with delayed postprandial clearance. Mice on a high-fat diet exihibited no diet-induced up-regulation of adipsin/CFD expression nor adipocyte differentiation. Ref.15 |
| Sequence similarities | Contains 1 anaphylatoxin-like domain. Contains 1 NTR domain. |
Ontologies
Alternative products
| This entry describes 2 isoforms produced by alternative initiation. [Align] [Select] | ||||||
| Isoform Long (identifier: P01027-1) This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. | ||||||
| Isoform Short (identifier: P01027-2) The sequence of this isoform differs from the canonical sequence as follows: 1-1128: Missing. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||||
Molecule processing | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Signal peptide | 1 – 24 | 24 | Ref.7 Ref.8 | ||||||||
| Chain | 25 – 1663 | 1639 | Complement C3 | PRO_0000005917 | |||||||
| Chain | 25 – 666 | 642 | Complement C3 beta chain | PRO_0000005918 | |||||||
| Chain | 671 – 1663 | 993 | Complement C3 alpha chain | PRO_0000005919 | |||||||
| Chain | 671 – 748 | 78 | C3a anaphylatoxin | PRO_0000005920 | |||||||
| Chain | 671 – 747 | 77 | Acylation stimulating protein | PRO_0000419936 | |||||||
| Chain | 749 – 1663 | 915 | Complement C3b alpha' chain | PRO_0000005921 | |||||||
| Chain | 749 – 954 | 206 | Complement C3c alpha' chain fragment 1 | PRO_0000005922 | |||||||
| Chain | 955 – 1303 | 349 | Complement C3dg fragment | PRO_0000005923 | |||||||
| Chain | 955 – 1001 | 47 | Complement C3g fragment | PRO_0000005924 | |||||||
| Chain | 1002 – 1303 | 302 | Complement C3d fragment | PRO_0000005925 | |||||||
| Peptide | 1304 – 1320 | 17 | Complement C3f fragment | PRO_0000005927 | |||||||
| Chain | 1321 – 1663 | 343 | Complement C3c alpha' chain fragment 2 | PRO_0000273949 | |||||||
Regions | |||||||||||
| Domain | 693 – 728 | 36 | Anaphylatoxin-like | ||||||||
| Domain | 1518 – 1661 | 144 | NTR | ||||||||
| Region | 1424 – 1456 | 33 | Properdin-binding By similarity | ||||||||
Sites | |||||||||||
| Site | 747 – 748 | 2 | Cleavage; by carboxypeptidases By similarity | ||||||||
| Site | 748 – 749 | 2 | Cleavage; by C3 convertase | ||||||||
| Site | 954 – 955 | 2 | Cleavage; by factor I Potential | ||||||||
| Site | 1303 – 1304 | 2 | Cleavage; by factor I | ||||||||
| Site | 1320 – 1321 | 2 | Cleavage; by factor I | ||||||||
Amino acid modifications | |||||||||||
| Modified residue | 489 | 1 | Phosphotyrosine Ref.14 | ||||||||
| Glycosylation | 939 | 1 | N-linked (GlcNAc...) | ||||||||
| Glycosylation | 1617 | 1 | N-linked (GlcNAc...) | ||||||||
| Disulfide bond | 559 ↔ 816 | Interchain (between beta and alpha chains) By similarity | |||||||||
| Disulfide bond | 626 ↔ 661 | By similarity | |||||||||
| Disulfide bond | 693 ↔ 720 | By similarity | |||||||||
| Disulfide bond | 694 ↔ 727 | By similarity | |||||||||
| Disulfide bond | 707 ↔ 728 | By similarity | |||||||||
| Disulfide bond | 873 ↔ 1513 | By similarity | |||||||||
| Disulfide bond | 1101 ↔ 1158 | By similarity | |||||||||
| Disulfide bond | 1358 ↔ 1489 | By similarity | |||||||||
| Disulfide bond | 1389 ↔ 1458 | By similarity | |||||||||
| Disulfide bond | 1506 ↔ 1511 | By similarity | |||||||||
| Disulfide bond | 1518 ↔ 1590 | By similarity | |||||||||
| Disulfide bond | 1537 ↔ 1661 | By similarity | |||||||||
| Disulfide bond | 1637 ↔ 1646 | By similarity | |||||||||
| Cross-link | 1010 ↔ 1013 | Isoglutamyl cysteine thioester (Cys-Gln) By similarity | |||||||||
Natural variations | |||||||||||
| Alternative sequence | 1 – 1128 | 1128 | Missing in isoform Short. | VSP_018708 | |||||||
Experimental info | |||||||||||
| Sequence conflict | 137 | 1 | K → Q in AAA37339. Ref.6 | ||||||||
| Sequence conflict | 858 | 1 | E → Q in AAC42013. Ref.1 | ||||||||
| Sequence conflict | 1553 | 1 | E → K in AAC42013. Ref.1 | ||||||||
| Sequence conflict | 1553 | 1 | E → K in AAA37336. Ref.10 | ||||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "Nucleotide sequence of complementary DNA and derived amino acid sequence of murine complement protein C3." Fey G.H., Lundwall A., Wetsel R.A., Tack B.F., de Bruijn M.H.L., Domdey H. Philos. Trans. R. Soc. Lond., B, Biol. Sci. 306:333-344(1984) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM LONG). |
| [2] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]. Strain: FVB/N. Tissue: Liver. |
| [3] | "Structure of murine complement component C3. I. Nucleotide sequence of cloned complementary and genomic DNA coding for the beta chain." Lundwall A., Wetsel R.A., Domdey H., Tack B.F., Fey G.H. J. Biol. Chem. 259:13851-13856(1984) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-724 (ISOFORM LONG). |
| [4] | "Isolation and analysis of genomic DNA clones encoding the third component of mouse complement." Wiebauer K., Domdey H., Diggelmann H., Fey G. Proc. Natl. Acad. Sci. U.S.A. 79:7077-7081(1982) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-34. |
| [5] | "Common evolutionary origin of alpha 2-macroglobulin and complement components C3 and C4." Sottrup-Jensen L., Stepanik T.M., Kristensen T., Lonblad P.B., Jones C.M., Wierzbicki D.M., Magnusson S., Domdey H., Wetsel R.A., Lundwall A., Tack B.F., Fey G.H. Proc. Natl. Acad. Sci. U.S.A. 82:9-13(1985) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 25-1663 (ISOFORM LONG). |
| [6] | "Structure and expression of the C3 gene." Fey G., Domdey H., Wiebauer K., Whitehead A.S., Odink K. Springer Semin. Immunopathol. 6:119-147(1983) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 25-240 (ISOFORM LONG). |
| [7] | "A paracrine migration-stimulating factor for metastatic tumor cells secreted by mouse hepatic sinusoidal endothelial cells: identification as complement component C3b." Hamada J., Cavanaugh P.G., Miki K., Nicolson G.L. Cancer Res. 53:4418-4423(1993) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE OF 25-41 AND 749-760. |
| [8] | "The specific production of the third component of complement by osteoblastic cells treated with 1 alpha,25-dihydroxyvitamin D3." Sato T., Hong M.H., Jin C.H., Ishimi Y., Udagawa N., Shinki T., Abe E., Suda T. FEBS Lett. 285:21-24(1991) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE OF 25-31 AND 671-680. |
| [9] | "Amino acid sequences of mouse complement C3 derived from nucleotide sequences of cloned cDNA." Fey G.H., Wiebauer K., Domdey H. Ann. N. Y. Acad. Sci. 421:307-312(1983) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 658-761. |
| [10] | "Structure of murine complement component C3. II. Nucleotide sequence of cloned complementary DNA coding for the alpha chain." Wetsel R.A., Lundwall A., Davidson F., Gibson T., Tack B.F., Fey G.H. J. Biol. Chem. 259:13857-13862(1984) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 671-1663 (ISOFORM LONG). |
| [11] | "Characterization of the mRNA and cloned cDNA specifying the third component of mouse complement." Domdey H., Wiebauer K., Kazmaier M., Mueller V., Odink K., Fey G.H. Proc. Natl. Acad. Sci. U.S.A. 79:7619-7623(1982) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 671-748. |
| [12] | "The structure of an alternate form of complement C3 that displays costimulatory growth factor activity for B lymphocytes." Cahen-Kramer Y., Martensson I.L., Melchers F. J. Exp. Med. 180:2079-2088(1994) [PubMed] [Europe PMC] [Abstract] Cited for: ALTERNATIVE INITIATION (ISOFORM SHORT). |
| [13] | "Acylation-stimulating protein (ASP) deficiency induces obesity resistance and increased energy expenditure in ob/ob mice." Xia Z., Sniderman A.D., Cianflone K. J. Biol. Chem. 277:45874-45879(2002) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION. |
| [14] | "Protein phosphorylation and expression profiling by Yin-yang multidimensional liquid chromatography (Yin-yang MDLC) mass spectrometry." Dai J., Jin W.-H., Sheng Q.-H., Shieh C.-H., Wu J.-R., Zeng R. J. Proteome Res. 6:250-262(2007) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT TYR-489, MASS SPECTROMETRY. Tissue: Liver. |
| [15] | "Acylation-stimulating protein deficiency and altered adipose tissue in alternative complement pathway knockout mice." Paglialunga S., Fisette A., Yan Y., Deshaies Y., Brouillette J.F., Pekna M., Cianflone K. Am. J. Physiol. 294:E521-E529(2008) [PubMed] [Europe PMC] [Abstract] Cited for: DISRUPTION PHENOTYPE, FUNCTION. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | K02782 mRNA. Translation: AAC42013.1. BC043338 mRNA. Translation: AAH43338.1. M35659 mRNA. Translation: AAA37339.1. M33032 mRNA. Translation: AAA37378.1. J00369, J00367 Genomic DNA. Translation: AAA37336.1. Z37998 Genomic DNA. Translation: CAA86099.2. |
| IPI | IPI00323624. IPI00759878. |
| PIR | C3MS. A92459. I48284. |
| RefSeq | NP_033908.2. NM_009778.2. |
| UniGene | Mm.19131. |
3D structure databases | |
| ProteinModelPortal | P01027. |
| SMR | P01027. Positions 26-663, 672-1663. |
| ModBase | Search... |
Protein-protein interaction databases | |
| IntAct | P01027. 1 interaction. |
Protein family/group databases | |
| MEROPS | I39.950. |
PTM databases | |
| PhosphoSite | P01027. |
Proteomic databases | |
| PaxDb | P01027. |
| PRIDE | P01027. |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENSMUST00000024988; ENSMUSP00000024988; ENSMUSG00000024164. |
| GeneID | 12266. |
| KEGG | mmu:12266. |
Organism-specific databases | |
| CTD | 718. |
| MGI | MGI:88227. C3. |
Phylogenomic databases | |
| eggNOG | NOG241555. |
| GeneTree | ENSGT00560000077078. |
| HOGENOM | HOG000286028. |
| HOVERGEN | HBG005110. |
| InParanoid | Q80XP1. |
| KO | K03990. |
| OMA | AYYTLIG. |
| OrthoDB | EOG41G337. |
Gene expression databases | |
| ArrayExpress | P01027. |
| Bgee | P01027. |
| CleanEx | MM_C3. |
| Genevestigator | P01027. |
| GermOnline | ENSMUSG00000024164. Mus musculus. |
Family and domain databases | |
| Gene3D | 1.20.91.20. 1 hit. 2.60.40.690. 1 hit. |
| InterPro | IPR009048. A-macroglobulin_rcpt-bd. IPR011626. A2M_comp. IPR002890. A2M_N. IPR011625. A2M_N_2. IPR000020. Anaphylatoxin/fibulin. IPR018081. Anaphylatoxin_. IPR001840. Anaphylatoxn. IPR001599. Macroglobln_a2. IPR019742. MacrogloblnA2_CS. IPR019565. MacrogloblnA2_thiol-ester-bond. IPR001134. Netrin_domain. IPR018933. Netrin_module_non-TIMP. IPR008930. Terpenoid_cyclase/PrenylTrfase. IPR008993. TIMP-like_OB-fold. [Graphical view] |
| Pfam | PF00207. A2M. 1 hit. PF07678. A2M_comp. 1 hit. PF01835. A2M_N. 1 hit. PF07703. A2M_N_2. 1 hit. PF07677. A2M_recep. 1 hit. PF01821. ANATO. 1 hit. PF01759. NTR. 1 hit. PF10569. Thiol-ester_cl. 1 hit. [Graphical view] |
| PRINTS | PR00004. ANAPHYLATOXN. |
| SMART | SM00104. ANATO. 1 hit. SM00643. C345C. 1 hit. [Graphical view] |
| SUPFAM | SSF49410. AM_receptor_bind. 1 hit. SSF47686. Anaphylatoxin. 1 hit. SSF48239. Terp_cyc_toroid. 1 hit. SSF50242. TIMP_like. 1 hit. |
| PROSITE | PS00477. ALPHA_2_MACROGLOBULIN. 1 hit. PS01177. ANAPHYLATOXIN_1. 1 hit. PS01178. ANAPHYLATOXIN_2. 1 hit. PS50189. NTR. 1 hit. [Graphical view] |
| ProtoNet | Search... |
Other | |
| ChiTaRS | C3. mouse. |
| NextBio | 280714. |
| PMAP-CutDB | Q80XP1. |
| SOURCE | Search... |
Entry information
| Entry name | CO3_MOUSE | ||||||||
| Accession | Primary (citable) accession number: P01027 Secondary accession number(s): Q61370, Q80XP1 | ||||||||
| Entry history |
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| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
Relevant documents
| MGD cross-references Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with
