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(-) Description

Title :  CR2-C3D COMPLEX STRUCTURE
 
Authors :  G. Szakonyi, J. M. Guthridge, D. Li, V. M. Holers, X. S. Chen
Date :  11 Jan 01  (Deposition) - 13 Jun 01  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.04
Chains :  Asym./Biol. Unit :  A,B,C
Keywords :  Cr2, C3D, Immune System/Viral Protein Receptor Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  G. Szakonyi, J. M. Guthridge, D. Li, K. Young, V. M. Holers, X. S. Chen
Structure Of Complement Receptor 2 In Complex With Its C3D Ligand.
Science V. 292 1725 2001
PubMed-ID: 11387479  |  Reference-DOI: 10.1126/SCIENCE.1059118
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - COMPLEMENT C3
    ChainsA
    FragmentFRAGMENT OF ALPHA CHAIN
    MutationYES
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
 
Molecule 2 - CR2/CD121/C3D/EPSTEIN-BARR VIRUS RECEPTOR
    ChainsB, C
    FragmentSEQUENCE DATABASE RESIDUES 21-153
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606

 Structural Features

(-) Chains, Units

  123
Asymmetric/Biological Unit ABC

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 4)

Asymmetric/Biological Unit (2, 4)
No.NameCountTypeFull Name
1NDG2Ligand/Ion2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE
2ZN2Ligand/IonZINC ION

(-) Sites  (4, 4)

Asymmetric Unit (4, 4)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREPRO A:173 , THR A:177 , THR C:101 , ASN C:102 , HOH C:782 , HOH C:814 , HOH C:815BINDING SITE FOR RESIDUE NDG C 701
2AC2SOFTWAREASN B:102BINDING SITE FOR RESIDUE NDG B 702
3AC3SOFTWARELYS B:82BINDING SITE FOR RESIDUE ZN B 801
4AC4SOFTWAREGLU A:117 , HOH A:1108 , HOH B:922BINDING SITE FOR RESIDUE ZN A 802

(-) SS Bonds  (9, 9)

Asymmetric/Biological Unit
No.Residues
1A:108 -A:165
2B:4 -B:46
3B:32 -B:63
4B:72 -B:113
5B:99 -B:127
6C:4 -C:46
7C:32 -C:63
8C:72 -C:113
9C:99 -C:127

(-) Cis Peptide Bonds  (5, 5)

Asymmetric/Biological Unit
No.Residues
1Thr B:20 -Pro B:21
2Thr B:87 -Pro B:88
3Thr C:20 -Pro C:21
4Thr C:87 -Pro C:88
5Leu C:133 -Glu C:134

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (7, 7)

Asymmetric/Biological Unit (7, 7)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_063655R1042LCO3_HUMANDisease (AHUS5)  ---AR49L
2UniProtVAR_063216A1094VCO3_HUMANDisease (AHUS5)121909584AA101V
3UniProtVAR_063217D1115NCO3_HUMANDisease (AHUS5)121909585AD122N
4UniProtVAR_063218C1158WCO3_HUMANDisease (AHUS5)  ---AC165W
5UniProtVAR_063219Q1161KCO3_HUMANDisease (AHUS5)  ---AQ168K
6UniProtVAR_022761D1216NCO3_HUMANUnclassified  ---AD223N
7UniProtVAR_019207G1224DCO3_HUMANPolymorphism11569534AG231D

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

(-) PROSITE Motifs  (2, 6)

Asymmetric/Biological Unit (2, 6)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SUSHIPS50923 Sushi/CCP/SCR domain profile.CR2_HUMAN21-84
 
89-148
 
152-212
213-273
274-344
408-468
349-407
469-524
525-595
600-659
660-716
717-781
786-845
849-909
910-970
  5B:2-65
C:2-65
B:70-129
C:70-129
C:133-134
-
-
-
-
-
-
-
-
-
-
-
-
2ALPHA_2_MACROGLOBULINPS00477 Alpha-2-macroglobulin family thiolester region signature.CO3_HUMAN1007-1015  1A:14-22

(-) Exons   (10, 12)

Asymmetric/Biological Unit (10, 12)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.3aENST000002459073aENSE00001938285chr19:6720693-6720527167CO3_HUMAN1-25250--
1.4ENST000002459074ENSE00001053574chr19:6719414-6719222193CO3_HUMAN25-89650--
1.5ENST000002459075ENSE00000858140chr19:6718423-6718258166CO3_HUMAN90-145560--
1.6aENST000002459076aENSE00001053592chr19:6718175-671810571CO3_HUMAN145-168240--
1.7ENST000002459077ENSE00000858137chr19:6714457-671436395CO3_HUMAN169-200320--
1.8bENST000002459078bENSE00001053577chr19:6714259-671417783CO3_HUMAN200-228290--
1.9ENST000002459079ENSE00001053565chr19:6714093-671400391CO3_HUMAN228-258310--
1.11ENST0000024590711ENSE00001053527chr19:6713520-6713418103CO3_HUMAN258-292350--
1.12bENST0000024590712bENSE00000858133chr19:6713326-6713200127CO3_HUMAN293-335430--
1.13ENST0000024590713ENSE00001053519chr19:6712634-6712519116CO3_HUMAN335-373390--
1.14bENST0000024590714bENSE00001053582chr19:6712417-6712268150CO3_HUMAN374-423500--
1.15ENST0000024590715ENSE00000858130chr19:6711207-6710998210CO3_HUMAN424-493700--
1.16bENST0000024590716bENSE00001159750chr19:6710856-6710650207CO3_HUMAN494-562690--
1.17bENST0000024590717bENSE00000858128chr19:6709853-6709695159CO3_HUMAN563-615530--
1.18ENST0000024590718ENSE00000858127chr19:6707940-6707811130CO3_HUMAN616-659440--
1.19ENST0000024590719ENSE00001053520chr19:6707548-670747772CO3_HUMAN659-683250--
1.20ENST0000024590720ENSE00001053532chr19:6707284-6707087198CO3_HUMAN683-749670--
1.21cENST0000024590721cENSE00001053537chr19:6702590-6702482109CO3_HUMAN749-785370--
1.22ENST0000024590722ENSE00001053579chr19:6702223-670213886CO3_HUMAN785-814300--
1.23bENST0000024590723bENSE00001053525chr19:6697805-6697663143CO3_HUMAN814-861480--
1.23dENST0000024590723dENSE00000858122chr19:6697567-6697355213CO3_HUMAN862-932710--
1.24bENST0000024590724bENSE00000858121chr19:6696670-669660467CO3_HUMAN933-955230--
1.25ENST0000024590725ENSE00001053553chr19:6696476-669639087CO3_HUMAN955-984300--
1.26ENST0000024590726ENSE00000858119chr19:6694645-6694442204CO3_HUMAN984-1052691A:1-5959
1.27ENST0000024590727ENSE00000858118chr19:6693498-669342376CO3_HUMAN1052-1077261A:59-8426
1.28cENST0000024590728cENSE00000858117chr19:6693094-6692935160CO3_HUMAN1077-1130541A:84-13754
1.29ENST0000024590729ENSE00000858116chr19:6690738-669064099CO3_HUMAN1131-1163331A:138-17033
1.31aENST0000024590731aENSE00000858115chr19:6686913-6686757157CO3_HUMAN1164-1216531A:171-22353
1.31dENST0000024590731dENSE00001504968chr19:6686298-6686135164CO3_HUMAN1216-1270551A:223-27755
1.32ENST0000024590732ENSE00001159688chr19:6685157-6684999159CO3_HUMAN1271-1323531A:278-30730
1.33ENST0000024590733ENSE00000858111chr19:6684845-668478660CO3_HUMAN1324-1343200--
1.34aENST0000024590734aENSE00001053551chr19:6684661-668457191CO3_HUMAN1344-1374310--
1.35aENST0000024590735aENSE00000858109chr19:6684450-668439952CO3_HUMAN1374-1391180--
1.36bENST0000024590736bENSE00000858108chr19:6682240-668215388CO3_HUMAN1391-1420300--
1.37ENST0000024590737ENSE00000858107chr19:6682041-668195290CO3_HUMAN1421-1450300--
1.38ENST0000024590738ENSE00000858106chr19:6680274-6680169106CO3_HUMAN1451-1486360--
1.40aENST0000024590740aENSE00000858105chr19:6679507-667941890CO3_HUMAN1486-1516310--
1.41aENST0000024590741aENSE00000858104chr19:6679219-667913684CO3_HUMAN1516-1544290--
1.42ENST0000024590742ENSE00000858103chr19:6678466-667838384CO3_HUMAN1544-1572290--
1.43ENST0000024590743ENSE00000858102chr19:6678298-6678163136CO3_HUMAN1572-1617460--
1.44cENST0000024590744cENSE00001159829chr19:6678034-6677846189CO3_HUMAN1617-1663470--

2.1aENST000003670581aENSE00001952555chr1:207627575-207627821247CR2_HUMAN1-20202B:1-1
C:1-1
1
1
2.3bENST000003670583bENSE00001069650chr1:207639871-207640257387CR2_HUMAN20-1491302B:1-129
C:1-130
129
130
2.4bENST000003670584bENSE00000882434chr1:207641872-207642060189CR2_HUMAN149-212641-
C:130-134
-
5
2.5ENST000003670585ENSE00000882436chr1:207642145-207642244100CR2_HUMAN212-245340--
2.6ENST000003670586ENSE00000791926chr1:207642495-20764257783CR2_HUMAN245-273290--
2.7bENST000003670587bENSE00000882439chr1:207643040-207643447408CR2_HUMAN273-4091370--
2.8ENST000003670588ENSE00000882440chr1:207644085-207644261177CR2_HUMAN409-468600--
2.9aENST000003670589aENSE00000882441chr1:207644342-20764443291CR2_HUMAN468-498310--
2.10ENST0000036705810ENSE00001167936chr1:207644768-20764484477CR2_HUMAN498-524270--
2.12bENST0000036705812bENSE00001381764chr1:207646117-207646524408CR2_HUMAN524-6601370--
2.14ENST0000036705814ENSE00001167916chr1:207647146-20764723085CR2_HUMAN660-688290--
2.15ENST0000036705815ENSE00001167908chr1:207647586-20764766883CR2_HUMAN688-716290--
2.16aENST0000036705816aENSE00001167899chr1:207648169-207648561393CR2_HUMAN716-8471320--
2.17ENST0000036705817ENSE00001167890chr1:207649579-207649764186CR2_HUMAN847-909630--
2.18ENST0000036705818ENSE00001167878chr1:207651230-207651415186CR2_HUMAN909-971630--
2.19ENST0000036705819ENSE00001167866chr1:207652602-20765262524CR2_HUMAN971-97990--
2.20ENST0000036705820ENSE00001167855chr1:207653323-20765339876CR2_HUMAN979-1004260--
2.21bENST0000036705821bENSE00001246608chr1:207658809-207658917109CR2_HUMAN1004-1033300--
2.22bENST0000036705822bENSE00001841611chr1:207662487-207663240754CR2_HUMAN-00--

(-) Sequences/Alignments

Asymmetric/Biological Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
(details for a mapped element are shown in a popup box when the mouse pointer rests over it)
Chain A from PDB  Type:PROTEIN  Length:307
 aligned with CO3_HUMAN | P01024 from UniProtKB/Swiss-Prot  Length:1663

    Alignment length:307
                                                                                                                                                                                                                                                                                                                                1288           
                                                                                                                                                                                                                                                                                                                              1287 |           
                                  1003      1013      1023      1033      1043      1053      1063      1073      1083      1093      1103      1113      1123      1133      1143      1153      1163      1173      1183      1193      1203      1213      1223      1233      1243      1253      1263      1273      1283   | |1292       
           CO3_HUMAN    994 AVDAERLKHLIVTPSGCGEQNMIGMTPTVIAVHYLDETEQWEKFGLEKRQGALELIKKGYTQQLAFRQPSSAFAAFVKRAPSTWLTAYVVKVFSLAVNLIAIDSQVLCGAVKWLILEKQKPDGVFQEDAPVIHQEMIGGLRNNNEKDMALTAFVLISLQEAKDICEEQVNSLPGSITKAGDFLEANYMNLQRSYTVAIAGYALAQMGRLKGPLLNKFLTTAKDKNRWEDPGKQLYNVEATSYALLALLQLKDFDFVPPVVRWLNEQRYYGGGYGSTQATFMVFQALAQYQKDAP-DHQELNLDVSLQ 1299
               SCOP domains d1ghqa_ A: Thio-ester containing domain (TED) from Complement C3, aka C3d or C3dg                                                                                                                                                                                                                                   SCOP domains
               CATH domains 1ghqA00 A:1-307  [code=1.50.10.20, no name defined]                                                                                                                                                                                                                                                                 CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..hhhhhhh.........hhhhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhh................hhhhhhhhhhhhhhhh.....hhhhhhhhhhhhhhhhh.............hhhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhh....hhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhh...hhhhhhhhhhhh.hhh.........hhhhhhhhhhhhhhhhh...hhhhhhhhhhhh........hhhhhhhhhhhhhhhhhhhhhh........... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------L---------------------------------------------------V--------------------N------------------------------------------W--K------------------------------------------------------N-------D---------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------ALPHA_2_M--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
           Transcript 1 (1) Exon 1.26  PDB: A:1-59 UniProt: 984-1052 [INCOMPLETE]      ------------------------Exon 1.28c  PDB: A:84-137 UniProt: 1077-1130          Exon 1.29  PDB: A:138-170        Exon 1.31a  PDB: A:171-223 UniProt: 1164-1216        ------------------------------------------------------Exon 1.32  PDB: A:278-307      Transcript 1 (1)
           Transcript 1 (2) ----------------------------------------------------------Exon 1.27  PDB: A:59-84   ------------------------------------------------------------------------------------------------------------------------------------------Exon 1.31d  PDB: A:223-277 UniProt: 1216-1270          ------------------------------ Transcript 1 (2)
                1ghq A    1 MLDAERLKHLIVTPSGAGEQNMIGMTPTVIAVHYLDETEQWEKFGLEKRQGALELIKKGYTQQLAFRQPSSAFAAFVKRAPSTWLTAYVVKVFSLAVNLIAIDSQVLCGAVKWLILEKQKPDGVFQEDAPVIHQEMIGGLRNNNEKDMALTAFVLISLQEAKDICEEQVNSLPGSITKAGDFLEANYMNLQRSYTVAIAGYALAQMGRLKGPLLNKFLTTAKDKNRWEDPGKQLYNVEATSYALLALLQLKDFDFVPPVVRWLNEQRYYGGGYGSTQATFMVFQALAQYQKDAPSDHQELNLDVSLQ  307
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       

Chain B from PDB  Type:PROTEIN  Length:129
 aligned with CR2_HUMAN | P20023 from UniProtKB/Swiss-Prot  Length:1033

    Alignment length:129
                                    29        39        49        59        69        79        89        99       109       119       129       139         
           CR2_HUMAN     20 GISCGSPPPILNGRISYYSTPIAVGTVIRYSCSGTFRLIGEKSLLCITKDKVDGTWDKPAPKCEYFNKYSSCPEPIVPGGYKIRGSTPYRHGDSVTFACKTNFSMNGNKSVWCQANNMWGPTRLPTCVS  148
               SCOP domains d1ghqb1 B:1-66 Complement receptor 2, cr2                         d1ghqb2 B:67-129 Complement receptor 2, cr2                     SCOP domains
               CATH domains 1ghqB01 B:1-65 Complement Module, domain 1                       -----1ghqB02 B:71-129 Complement Module, domain 1                CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..ee........eee......ee...eeeeee...eeee...eeeee.......ee.....eeee..............eeeee.........eeeeee....eee...eee.............eee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -SUSHI  PDB: B:2-65 UniProt: 21-84                               ----SUSHI  PDB: B:70-129 UniProt: 89-148                         PROSITE
           Transcript 2 (1) 2-------------------------------------------------------------------------------------------------------------------------------- Transcript 2 (1)
           Transcript 2 (2) Exon 2.3b  PDB: B:1-129 UniProt: 20-149 [INCOMPLETE]                                                                              Transcript 2 (2)
                1ghq B    1 AISCGSPPPILNGRISYYSTPIAVGTVIRYSCSGTFRLIGEKSLLCITKDKVDGTWDKPAPKCEYFNKYSSCPEPIVPGGYKIRGSTPYRHGDSVTFACKTNFSMNGNKSVWCQANNMWGPTRLPTCVS  129
                                    10        20        30        40        50        60        70        80        90       100       110       120         

Chain C from PDB  Type:PROTEIN  Length:134
 aligned with CR2_HUMAN | P20023 from UniProtKB/Swiss-Prot  Length:1033

    Alignment length:134
                                    29        39        49        59        69        79        89        99       109       119       129       139       149    
           CR2_HUMAN     20 GISCGSPPPILNGRISYYSTPIAVGTVIRYSCSGTFRLIGEKSLLCITKDKVDGTWDKPAPKCEYFNKYSSCPEPIVPGGYKIRGSTPYRHGDSVTFACKTNFSMNGNKSVWCQANNMWGPTRLPTCVSVFPLE  153
               SCOP domains d1ghqc1 C:1-66 Complement receptor 2, cr2                         d1ghqc2 C:67-134 Complement receptor 2, cr2                          SCOP domains
               CATH domains 1ghqC01 C:1-65 Complement Module, domain 1                       -----1ghqC02 C:71-129 Complement Module, domain 1               ----- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..ee........eee......ee...eeeeee...eeee...eeeee.......ee.....eeee.....ee.......eeeee....ee...eeeeee...eeee...eee.............eeee..... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -SUSHI  PDB: C:2-65 UniProt: 21-84                               ----SUSHI  PDB: C:70-129 UniProt: 89-148                        ---SU PROSITE
           Transcript 2 (1) 2--------------------------------------------------------------------------------------------------------------------------------2.4b  Transcript 2 (1)
           Transcript 2 (2) Exon 2.3b  PDB: C:1-130 UniProt: 20-149                                                                                           ---- Transcript 2 (2)
                1ghq C    1 AISCGSPPPILNGRISYYSTPIAVGTVIRYSCSGTFRLIGEKSLLCITKDKVDGTWDKPAPKCEYFNKYSSCPEPIVPGGYKIRGSTPYRHGDSVTFACKTNFSMNGNKSVWCQANNMWGPTRLPTCVSVFPLE  134
                                    10        20        30        40        50        60        70        80        90       100       110       120       130    

   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
    → Modified Residue (blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (2, 5)

Asymmetric/Biological Unit

(-) CATH Domains  (2, 5)

Asymmetric/Biological Unit
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1GHQ)

(-) Gene Ontology  (61, 68)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (CO3_HUMAN | P01024)
molecular function
    GO:0031715    C5L2 anaphylatoxin chemotactic receptor binding    Interacting selectively and non-covalently with a C5L2 anaphylatoxin chemotactic receptor.
    GO:0048037    cofactor binding    Interacting selectively and non-covalently with a cofactor, a substance that is required for the activity of an enzyme or other protein. Cofactors may be inorganic, such as the metal atoms zinc, iron, and copper in certain forms, or organic, in which case they are referred to as coenzymes. Cofactors may either be bound tightly to active sites or bind loosely with the substrate.
    GO:0004866    endopeptidase inhibitor activity    Stops, prevents or reduces the activity of an endopeptidase, any enzyme that hydrolyzes nonterminal peptide bonds in polypeptides.
    GO:0008289    lipid binding    Interacting selectively and non-covalently with a lipid.
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
    GO:0005102    receptor binding    Interacting selectively and non-covalently with one or more specific sites on a receptor molecule, a macromolecule that undergoes combination with a hormone, neurotransmitter, drug or intracellular messenger to initiate a change in cell function.
    GO:0004252    serine-type endopeptidase activity    Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain by a catalytic mechanism that involves a catalytic triad consisting of a serine nucleophile that is activated by a proton relay involving an acidic residue (e.g. aspartate or glutamate) and a basic residue (usually histidine).
biological process
    GO:0007186    G-protein coupled receptor signaling pathway    A series of molecular signals that proceeds with an activated receptor promoting the exchange of GDP for GTP on the alpha-subunit of an associated heterotrimeric G-protein complex. The GTP-bound activated alpha-G-protein then dissociates from the beta- and gamma-subunits to further transmit the signal within the cell. The pathway begins with receptor-ligand interaction, or for basal GPCR signaling the pathway begins with the receptor activating its G protein in the absence of an agonist, and ends with regulation of a downstream cellular process, e.g. transcription. The pathway can start from the plasma membrane, Golgi or nuclear membrane (PMID:24568158 and PMID:16902576).
    GO:0007596    blood coagulation    The sequential process in which the multiple coagulation factors of the blood interact, ultimately resulting in the formation of an insoluble fibrin clot; it may be divided into three stages: stage 1, the formation of intrinsic and extrinsic prothrombin converting principle; stage 2, the formation of thrombin; stage 3, the formation of stable fibrin polymers.
    GO:0006956    complement activation    Any process involved in the activation of any of the steps of the complement cascade, which allows for the direct killing of microbes, the disposal of immune complexes, and the regulation of other immune processes; the initial steps of complement activation involve one of three pathways, the classical pathway, the alternative pathway, and the lectin pathway, all of which lead to the terminal complement pathway.
    GO:0006957    complement activation, alternative pathway    Any process involved in the activation of any of the steps of the alternative pathway of the complement cascade which allows for the direct killing of microbes and the regulation of other immune processes.
    GO:0006958    complement activation, classical pathway    Any process involved in the activation of any of the steps of the classical pathway of the complement cascade which allows for the direct killing of microbes, the disposal of immune complexes, and the regulation of other immune processes.
    GO:0006631    fatty acid metabolic process    The chemical reactions and pathways involving fatty acids, aliphatic monocarboxylic acids liberated from naturally occurring fats and oils by hydrolysis.
    GO:0006955    immune response    Any immune system process that functions in the calibrated response of an organism to a potential internal or invasive threat.
    GO:0002376    immune system process    Any process involved in the development or functioning of the immune system, an organismal system for calibrated responses to potential internal or invasive threats.
    GO:0006954    inflammatory response    The immediate defensive reaction (by vertebrate tissue) to infection or injury caused by chemical or physical agents. The process is characterized by local vasodilation, extravasation of plasma into intercellular spaces and accumulation of white blood cells and macrophages.
    GO:0045087    innate immune response    Innate immune responses are defense responses mediated by germline encoded components that directly recognize components of potential pathogens.
    GO:0006629    lipid metabolic process    The chemical reactions and pathways involving lipids, compounds soluble in an organic solvent but not, or sparingly, in an aqueous solvent. Includes fatty acids; neutral fats, other fatty-acid esters, and soaps; long-chain (fatty) alcohols and waxes; sphingoids and other long-chain bases; glycolipids, phospholipids and sphingolipids; and carotenes, polyprenols, sterols, terpenes and other isoprenoids.
    GO:0010951    negative regulation of endopeptidase activity    Any process that decreases the frequency, rate or extent of endopeptidase activity, the endohydrolysis of peptide bonds within proteins.
    GO:0070374    positive regulation of ERK1 and ERK2 cascade    Any process that activates or increases the frequency, rate or extent of signal transduction mediated by the ERK1 and ERK2 cascade.
    GO:0045745    positive regulation of G-protein coupled receptor protein signaling pathway    Any process that activates or increases the frequency, rate or extent of G-protein coupled receptor protein signaling pathway activity.
    GO:0001970    positive regulation of activation of membrane attack complex    Any process that activates, maintains or increases the frequency, rate or extent of the activation of the membrane attack complex components of the complement cascade.
    GO:0045766    positive regulation of angiogenesis    Any process that activates or increases angiogenesis.
    GO:2000427    positive regulation of apoptotic cell clearance    Any process that activates or increases the frequency, rate or extent of apoptotic cell clearance.
    GO:0048639    positive regulation of developmental growth    Any process that activates, maintains or increases the rate of developmental growth.
    GO:0010828    positive regulation of glucose transport    Any process that increases the frequency, rate or extent of glucose transport. Glucose transport is the directed movement of the hexose monosaccharide glucose into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0010884    positive regulation of lipid storage    Any process that increases the rate, frequency or extent of lipid storage. Lipid storage is the accumulation and maintenance in cells or tissues of lipids, compounds soluble in organic solvents but insoluble or sparingly soluble in aqueous solvents. Lipid reserves can be accumulated during early developmental stages for mobilization and utilization at later stages of development.
    GO:0050766    positive regulation of phagocytosis    Any process that activates or increases the frequency, rate or extent of phagocytosis.
    GO:0001934    positive regulation of protein phosphorylation    Any process that activates or increases the frequency, rate or extent of addition of phosphate groups to amino acids within a protein.
    GO:0001798    positive regulation of type IIa hypersensitivity    Any process that activates or increases the frequency, rate or extent of type IIa hypersensitivity, a type of inflammatory response.
    GO:0010575    positive regulation of vascular endothelial growth factor production    Any process that increases or activates the frequency, rate, or extent of production of vascular endothelial growth factor.
    GO:0006508    proteolysis    The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
    GO:0030449    regulation of complement activation    Any process that modulates the frequency, rate or extent of complement activation.
    GO:0050776    regulation of immune response    Any process that modulates the frequency, rate or extent of the immune response, the immunological reaction of an organism to an immunogenic stimulus.
    GO:0010866    regulation of triglyceride biosynthetic process    Any process that modulates the rate, frequency, or extent of triglyceride biosynthesis. Triglyceride biosynthesis is the collection of chemical reactions and pathways resulting in the formation of triglyceride, any triester of glycerol.
    GO:0032355    response to estradiol    Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of stimulus by estradiol, a C18 steroid hormone hydroxylated at C3 and C17 that acts as a potent estrogen.
    GO:0043627    response to estrogen    Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of stimulus by an estrogen, C18 steroid hormones that can stimulate the development of female sexual characteristics.
    GO:0051384    response to glucocorticoid    Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a glucocorticoid stimulus. Glucocorticoids are hormonal C21 corticosteroids synthesized from cholesterol with the ability to bind with the cortisol receptor and trigger similar effects. Glucocorticoids act primarily on carbohydrate and protein metabolism, and have anti-inflammatory effects.
    GO:0032026    response to magnesium ion    Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a magnesium ion stimulus.
    GO:0032570    response to progesterone    Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a progesterone stimulus.
    GO:0007165    signal transduction    The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell.
    GO:0002507    tolerance induction    A process that directly activates any of the steps required for tolerance, a physiologic state in which the immune system does not react destructively against the components of an organism that harbors it or against antigens that are introduced to it.
cellular component
    GO:0072562    blood microparticle    A phospholipid microvesicle that is derived from any of several cell types, such as platelets, blood cells, endothelial cells, or others, and contains membrane receptors as well as other proteins characteristic of the parental cell. Microparticles are heterogeneous in size, and are characterized as microvesicles free of nucleic acids.
    GO:0070062    extracellular exosome    A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
    GO:0005576    extracellular region    The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.
    GO:0005615    extracellular space    That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid.
    GO:0005886    plasma membrane    The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

Chain B,C   (CR2_HUMAN | P20023)
molecular function
    GO:0003677    DNA binding    Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
    GO:0001848    complement binding    Interacting selectively and non-covalently with any component or product of the complement cascade.
    GO:0004875    complement receptor activity    Combining with any component or product of the complement cascade and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity.
    GO:0042803    protein homodimerization activity    Interacting selectively and non-covalently with an identical protein to form a homodimer.
    GO:0004888    transmembrane signaling receptor activity    Combining with an extracellular or intracellular signal and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity or state as part of signal transduction.
    GO:0001618    virus receptor activity    Combining with a virus component and mediating entry of the virus into the cell.
biological process
    GO:0030183    B cell differentiation    The process in which a precursor cell type acquires the specialized features of a B cell. A B cell is a lymphocyte of B lineage with the phenotype CD19-positive and capable of B cell mediated immunity.
    GO:0042100    B cell proliferation    The expansion of a B cell population by cell division. Follows B cell activation.
    GO:0006958    complement activation, classical pathway    Any process involved in the activation of any of the steps of the classical pathway of the complement cascade which allows for the direct killing of microbes, the disposal of immune complexes, and the regulation of other immune processes.
    GO:0002430    complement receptor mediated signaling pathway    A series of molecular signals generated as a consequence of a component of the complement pathway binding to a complement receptor. Such components include both whole complement proteins and fragments of complement proteins generated through the activity of the complement pathway.
    GO:0006955    immune response    Any immune system process that functions in the calibrated response of an organism to a potential internal or invasive threat.
    GO:0002376    immune system process    Any process involved in the development or functioning of the immune system, an organismal system for calibrated responses to potential internal or invasive threats.
    GO:0045087    innate immune response    Innate immune responses are defense responses mediated by germline encoded components that directly recognize components of potential pathogens.
    GO:0007165    signal transduction    The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell.
    GO:0046718    viral entry into host cell    The process that occurs after viral attachment by which a virus, or viral nucleic acid, breaches the plasma membrane or cell envelope and enters the host cell. The process ends when the viral nucleic acid is released into the host cell cytoplasm.
    GO:0016032    viral process    A multi-organism process in which a virus is a participant. The other participant is the host. Includes infection of a host cell, replication of the viral genome, and assembly of progeny virus particles. In some cases the viral genetic material may integrate into the host genome and only subsequently, under particular circumstances, 'complete' its life cycle.
cellular component
    GO:0070062    extracellular exosome    A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
    GO:0016021    integral component of membrane    The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005886    plasma membrane    The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
    GO:0043235    receptor complex    Any protein complex that undergoes combination with a hormone, neurotransmitter, drug or intracellular messenger to initiate a change in cell function.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        CO3_HUMAN | P010241c3d 1w2s 2a73 2a74 2gox 2i07 2ice 2icf 2noj 2qki 2wii 2win 2wy7 2wy8 2xqw 2xwb 2xwj 3d5r 3d5s 3g6j 3l3o 3l5n 3nms 3oed 3ohx 3oxu 3rj3 3t4a 4hw5 4hwj 4i6o 4m76 4ont 4zh1 5fo7 5fo8 5fo9 5foa 5fob 5m6w 5o32 5o35
        CR2_HUMAN | P200231ly2 1w2r 1w2s 2aty 2gsx 3oed

(-) Related Entries Specified in the PDB File

(no "Related Entries Specified in the PDB File" available for 1GHQ)