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(-) Description

Title :  UNIQUE CARBOHYDRATE/CARBOHYDRATE INTERACTIONS ARE REQUIRED FOR HIGH AFFINITY BINDING OF FCGIII AND ANTIBODIES LACKING CORE FUCOSE
 
Authors :  C. Ferrara, S. Grau, C. Jaeger, P. Sondermann, P. Bruenker, I. Waldhaue M. Hennig, A. Ruf, A. C. Rufer, M. Stihle, P. Umana, J. Benz
Date :  15 Jun 11  (Deposition) - 03 Aug 11  (Release) - 04 Apr 12  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.40
Chains :  Asym. Unit :  A,B,C
Biol. Unit 1:  A,B,C  (1x)
Biol. Unit 2:  A (1x),B (1x),C (1x)
Keywords :  Fc Receptor, Antibody, Afucosylation, Immune System (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  C. Ferrara, S. Grau, C. Jager, P. Sondermann, P. Brunker, I. Waldhauer M. Hennig, A. Ruf, A. C. Rufer, M. Stihle, P. Umana, J. Benz
Unique Carbohydrate-Carbohydrate Interactions Are Required For High Affinity Binding Between Fcgammariii And Antibodie Lacking Core Fucose.
Proc. Natl. Acad. Sci. Usa V. 108 12669 2011
PubMed-ID: 21768335  |  Reference-DOI: 10.1073/PNAS.1108455108

(-) Compounds

Molecule 1 - FC FRAGMENT
    ChainsA, B
    EngineeredYES
    Expression SystemCRICETULUS GRISEUS
    Expression System CommonCHINESE HAMSTER
    Expression System Taxid10029
    FragmentUNP RESIDUES 106-330
    GeneIGHG1
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
 
Molecule 2 - HUMAN FCG3A RECEPTOR
    ChainsC
    EngineeredYES
    Expression SystemHOMO SAPIENS
    Expression System Cell LineHEK293
    Expression System CommonHUMAN
    Expression System Taxid9606
    FragmentUNP RESIDUES 19-208
    GeneFCGR3A, CD16A, FCG3, FCGR3, IGFR3
    MutationYES
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606

 Structural Features

(-) Chains, Units

  123
Asymmetric Unit ABC
Biological Unit 1 (1x)ABC
Biological Unit 2 (1x)A (1x)B (1x)C (1x)

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (4, 27)

Asymmetric Unit (4, 27)
No.NameCountTypeFull Name
1BMA3Ligand/IonBETA-D-MANNOSE
2MAN9Ligand/IonALPHA-D-MANNOSE
3MLI1Ligand/IonMALONATE ION
4NAG14Ligand/IonN-ACETYL-D-GLUCOSAMINE
Biological Unit 1 (4, 27)
No.NameCountTypeFull Name
1BMA3Ligand/IonBETA-D-MANNOSE
2MAN9Ligand/IonALPHA-D-MANNOSE
3MLI1Ligand/IonMALONATE ION
4NAG14Ligand/IonN-ACETYL-D-GLUCOSAMINE
Biological Unit 2 (0, 0)
No.NameCountTypeFull Name
1BMA-1Ligand/IonBETA-D-MANNOSE
2MAN-1Ligand/IonALPHA-D-MANNOSE
3MLI-1Ligand/IonMALONATE ION
4NAG-1Ligand/IonN-ACETYL-D-GLUCOSAMINE

(-) Sites  (27, 27)

Asymmetric Unit (27, 27)
No.NameEvidenceResiduesDescription
01AC1SOFTWAREHOH A:159 , HOH A:191 , ASP A:265 , GLN A:295 , ASN A:297 , THR A:299 , HOH A:452 , NAG A:1447 , TYR C:132 , NAG C:1445 , NAG C:1447BINDING SITE FOR RESIDUE NAG A 1445
02AC2SOFTWAREHOH A:77 , PHE A:241 , VAL A:264 , ARG A:301 , NAG A:1445 , BMA A:1448 , MAN A:1450BINDING SITE FOR RESIDUE NAG A 1447
03AC3SOFTWAREPHE A:241 , PHE A:243 , NAG A:1447 , MAN A:1450 , MAN A:1451 , NAG A:1454BINDING SITE FOR RESIDUE BMA A 1448
04AC4SOFTWARENAG A:1447 , BMA A:1448 , NAG A:1453BINDING SITE FOR RESIDUE MAN A 1450
05AC5SOFTWAREHOH A:104 , HOH A:207 , LYS A:246 , MAN A:1450BINDING SITE FOR RESIDUE NAG A 1453
06AC6SOFTWAREHOH A:87 , PHE A:241 , BMA A:1448 , NAG A:1452BINDING SITE FOR RESIDUE MAN A 1451
07AC7SOFTWAREHOH A:87 , MAN A:1451 , NAG A:1454BINDING SITE FOR RESIDUE NAG A 1452
08AC8SOFTWARELEU A:242 , PHE A:243 , BMA A:1448 , NAG A:1452BINDING SITE FOR RESIDUE NAG A 1454
09AC9SOFTWAREPHE B:241 , BMA B:1448 , NAG B:1452BINDING SITE FOR RESIDUE MAN B 1451
10BC1SOFTWAREHOH B:99 , VAL B:264 , ASP B:265 , GLN B:295 , ASN B:297 , NAG B:1447BINDING SITE FOR RESIDUE NAG B 1445
11BC2SOFTWAREPHE B:241 , ARG B:301 , HOH B:451 , NAG B:1445 , BMA B:1448 , MAN B:1450BINDING SITE FOR RESIDUE NAG B 1447
12BC3SOFTWAREPHE B:243 , NAG B:1447 , MAN B:1450 , MAN B:1451 , NAG B:1452 , NAG B:1454BINDING SITE FOR RESIDUE BMA B 1448
13BC4SOFTWAREHOH B:29 , NAG B:1447 , BMA B:1448 , NAG B:1453BINDING SITE FOR RESIDUE MAN B 1450
14BC5SOFTWAREBMA B:1448 , MAN B:1451 , NAG B:1454BINDING SITE FOR RESIDUE NAG B 1452
15BC6SOFTWAREHOH B:26 , LYS B:246 , MAN B:1450BINDING SITE FOR RESIDUE NAG B 1453
16BC7SOFTWAREBMA B:1448 , NAG B:1452BINDING SITE FOR RESIDUE NAG B 1454
17BC8SOFTWAREHOH A:98 , NAG A:1445 , LYS C:120 , ARG C:155 , LEU C:157 , ASN C:162 , HOH C:227 , HOH C:243 , NAG C:1447BINDING SITE FOR RESIDUE NAG C 1445
18BC9SOFTWAREHOH A:98 , NAG A:1445 , ARG C:155 , HOH C:231 , HOH C:255 , NAG C:1445 , BMA C:1470BINDING SITE FOR RESIDUE NAG C 1447
19CC1SOFTWARETYR A:296 , NAG C:1447 , MAN C:1471 , MAN C:1475BINDING SITE FOR RESIDUE BMA C 1470
20CC2SOFTWAREHOH A:77 , HOH A:191 , HOH C:233 , HOH C:252 , BMA C:1470 , MAN C:1472BINDING SITE FOR RESIDUE MAN C 1471
21CC3SOFTWAREHOH A:191 , GLN A:295 , MAN C:1471BINDING SITE FOR RESIDUE MAN C 1472
22CC4SOFTWAREBMA C:1470 , MAN C:1476 , MAN C:1477BINDING SITE FOR RESIDUE MAN C 1475
23CC5SOFTWAREASN B:315 , MAN C:1475BINDING SITE FOR RESIDUE MAN C 1476
24CC6SOFTWARETYR A:296 , LYS B:340 , MAN C:1475BINDING SITE FOR RESIDUE MAN C 1477
25CC7SOFTWAREHIS C:44 , ASN C:45 , ASP C:64 , SER C:66 , HOH C:226 , NAG C:1461BINDING SITE FOR RESIDUE NAG C 1460
26CC8SOFTWAREASP C:64 , HOH C:229 , HOH C:236 , NAG C:1460BINDING SITE FOR RESIDUE NAG C 1461
27CC9SOFTWARELEU A:251 , MET A:252 , ILE A:253 , ASN A:434 , HIS A:435 , HOH A:453 , PHE C:43 , GLU C:46 , SER C:47 , LEU C:48BINDING SITE FOR RESIDUE MLI A 1

(-) SS Bonds  (6, 6)

Asymmetric Unit
No.Residues
1A:261 -A:321
2A:367 -A:425
3B:261 -B:321
4B:367 -B:425
5C:71 -C:29
6C:154 -C:110

(-) Cis Peptide Bonds  (4, 4)

Asymmetric Unit
No.Residues
1Tyr A:373 -Pro A:374
2Tyr B:373 -Pro B:374
3Gln B:419 -Gly B:420
4Glu C:13 -Pro C:14

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (7, 9)

Asymmetric Unit (7, 9)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_008800L66HFCG3A_HUMANDisease (IMD20)10127939CL48H
2UniProtVAR_008799L66RFCG3A_HUMANPolymorphism10127939CL48R
3UniProtVAR_058398G147DFCG3A_HUMANPolymorphism443082CG129D
4UniProtVAR_058399Y158HFCG3A_HUMANPolymorphism396716CY140H
5UniProtVAR_003960F176VFCG3A_HUMANPolymorphism396991CV158V
6UniProtVAR_003887D239EIGHG1_HUMANPolymorphism  ---A/BD356E
7UniProtVAR_003888L241MIGHG1_HUMANPolymorphism  ---A/BL358M

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)
Biological Unit 1 (7, 9)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_008800L66HFCG3A_HUMANDisease (IMD20)10127939CL48H
2UniProtVAR_008799L66RFCG3A_HUMANPolymorphism10127939CL48R
3UniProtVAR_058398G147DFCG3A_HUMANPolymorphism443082CG129D
4UniProtVAR_058399Y158HFCG3A_HUMANPolymorphism396716CY140H
5UniProtVAR_003960F176VFCG3A_HUMANPolymorphism396991CV158V
6UniProtVAR_003887D239EIGHG1_HUMANPolymorphism  ---A/BD356E
7UniProtVAR_003888L241MIGHG1_HUMANPolymorphism  ---A/BL358M

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)
Biological Unit 2 (7, 9)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_008800L66HFCG3A_HUMANDisease (IMD20)10127939CL48H
2UniProtVAR_008799L66RFCG3A_HUMANPolymorphism10127939CL48R
3UniProtVAR_058398G147DFCG3A_HUMANPolymorphism443082CG129D
4UniProtVAR_058399Y158HFCG3A_HUMANPolymorphism396716CY140H
5UniProtVAR_003960F176VFCG3A_HUMANPolymorphism396991CV158V
6UniProtVAR_003887D239EIGHG1_HUMANPolymorphism  ---A/BD356E
7UniProtVAR_003888L241MIGHG1_HUMANPolymorphism  ---A/BL358M

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

(-) PROSITE Motifs  (1, 2)

Asymmetric Unit (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1IG_MHCPS00290 Immunoglobulins and major histocompatibility complex proteins signature.IGHG1_HUMAN81-87
306-312
 
  2-
A:423-429
B:423-429
Biological Unit 1 (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1IG_MHCPS00290 Immunoglobulins and major histocompatibility complex proteins signature.IGHG1_HUMAN81-87
306-312
 
  2-
A:423-429
B:423-429
Biological Unit 2 (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1IG_MHCPS00290 Immunoglobulins and major histocompatibility complex proteins signature.IGHG1_HUMAN81-87
306-312
 
  2-
A:423-429
B:423-429

(-) Exons   (2, 4)

Asymmetric Unit (2, 4)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1ENST000003905491ENSE00001838294chr14:106209408-106209114295IGHG1_HUMAN1-99990--
1.2ENST000003905492ENSE00001719055chr14:106208722-10620867845IGHG1_HUMAN99-114160--
1.3bENST000003905493bENSE00001776617chr14:106208559-106208230330IGHG1_HUMAN114-2241112A:236-341
B:232-341
106
110
1.4cENST000003905494cENSE00001837466chr14:106208132-106207675458IGHG1_HUMAN224-3301072A:341-444
B:341-443
104
103

(-) Sequences/Alignments

Asymmetric 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:209
 aligned with IGHG1_HUMAN | P01857 from UniProtKB/Swiss-Prot  Length:330

    Alignment length:209
                                   128       138       148       158       168       178       188       198       208       218       228       238       248       258       268       278       288       298       308       318         
          IGHG1_HUMAN   119 GGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLS 327
               SCOP domains d3sgka1 A:236-341 Immunoglobulin heavy chain gamma constant domain 2, CH2-gamma                           d3sgka2 A:342-444 Immunoglobulin heavy chain gamma constant domain 3, CH3-gamma                         SCOP domains
               CATH domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...eeeee..hhhhhhh.....eeeeeeeee.......eeeeee..eee...ee...ee.....eeeeeeee.hhhhhhh...eeeeee.......eeeee..........eeeee..hhhhhhh.eeeeeeeeeee.....eeeeee..eee..eee...ee.....eeeeeeeeeehhhhhh...eeeeee...hhhhheeeee... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------E-M-------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------IG_MHC --------------- PROSITE
           Transcript 1 (1) Exon 1.3b  PDB: A:236-341 UniProt: 114-224 [INCOMPLETE]                                                   ------------------------------------------------------------------------------------------------------- Transcript 1 (1)
           Transcript 1 (2) ---------------------------------------------------------------------------------------------------------Exon 1.4c  PDB: A:341-444 UniProt: 224-330 [INCOMPLETE]                                                  Transcript 1 (2)
                 3sgk A 236 GGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLS 444
                                   245       255       265       275       285       295       305       315       325       335       345       355       365       375       385       395       405       415       425       435         

Chain B from PDB  Type:PROTEIN  Length:212
 aligned with IGHG1_HUMAN | P01857 from UniProtKB/Swiss-Prot  Length:330

    Alignment length:212
                                   124       134       144       154       164       174       184       194       204       214       224       234       244       254       264       274       284       294       304       314       324  
          IGHG1_HUMAN   115 PELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSL 326
               SCOP domains d3sgkb1 B:232-341 Immunoglobulin heavy chain gamma constant domain 2, CH2-gamma                               d3sgkb2 B:342-443 Immunoglobulin heavy chain gamma constant domain 3, CH3-gamma                        SCOP domains
               CATH domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .......eeeee..hhhhhhh.....eeeeeeeee.......eeeeee..eee...ee...ee.....eeeeeeee.hhhhhhh...eeeeee.......eeeee..........eeeee....hhhhh.eeeeeeeeeee.....eeeeee..ee...eee...ee.....eeeeeeeeeehhhhh....eeeeee...hhhhheeeee.. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------E-M------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------IG_MHC -------------- PROSITE
           Transcript 1 (1) Exon 1.3b  PDB: B:232-341 UniProt: 114-224 [INCOMPLETE]                                                       ------------------------------------------------------------------------------------------------------ Transcript 1 (1)
           Transcript 1 (2) -------------------------------------------------------------------------------------------------------------Exon 1.4c  PDB: B:341-443 UniProt: 224-330 [INCOMPLETE]                                                 Transcript 1 (2)
                 3sgk B 232 PELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSL 443
                                   241       251       261       271       281       291       301       311       321       331       341       351       361       371       381       391       401       411       421       431       441  

Chain C from PDB  Type:PROTEIN  Length:165
 aligned with FCG3A_HUMAN | P08637 from UniProtKB/Swiss-Prot  Length:254

    Alignment length:170
                                    32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192
          FCG3A_HUMAN    23 LPKAVVFLEPQWYRVLEKDSVTLKCQGAYSPEDNSTQWFHNESLISSQASSYFIDAATVDDSGEYRCQTNLSTLSDPVQLEVHIGWLLLQAPRWVFKEEDPIHLRCHSWKNTALHKVTYLQNGKGRKYFHHNSDFYIPKATLKDSGSYFCRGLFGSKNVSSETVNITITQ 192
               SCOP domains d3sgkc1 C:5-86 automated mat     ches                                             d3sgkc2 C:87-174 automated matches                                                       SCOP domains
               CATH domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....eeeee....eee....eeeeee..-----..eeeee..ee......eeee...hhhhheeeeeee........eeeeee...eeee....eee....eeeeeee.hhh..eeeeeee..eeeeeeee...eee...hhhhheeeeeeeee..eeee...eeeeee. Sec.struct. author
             SAPs(SNPs) (1) -------------------------------------------H--------------------------------------------------------------------------------D----------H-----------------V---------------- SAPs(SNPs) (1)
             SAPs(SNPs) (2) -------------------------------------------R------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs) (2)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3sgk C   5 LPKAVVFLEPQWYRVLEKDSVTLKCQGA-----QSTQWFHNESLISSQASSYFIDAATVDDSGEYRCQTQLSTLSDPVQLEVHIGWLLLQAPRWVFKEEDPIHLRCHSWKNTALHKVTYLQNGKGRKYFHHNSDFYIPKATLKDSGSYFCRGLVGSKNVSSETVQITITQ 174
                                    14        24       | -   |    44        54        64        74        84        94       104       114       124       134       144       154       164       174
                                                      32    38                                                                                                                                        

   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  (3, 6)

Asymmetric Unit

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 3SGK)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 3SGK)

(-) Gene Ontology  (26, 30)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (IGHG1_HUMAN | P01857)
molecular function
    GO:0003823    antigen binding    Interacting selectively and non-covalently with an antigen, any substance which is capable of inducing a specific immune response and of reacting with the products of that response, the specific antibody or specifically sensitized T-lymphocytes, or both. Binding may counteract the biological activity of the antigen.
    GO:0034987    immunoglobulin receptor binding    Interacting selectively and non-covalently with one or more specific sites on an immunoglobulin receptor molecule.
    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: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:0050853    B cell receptor signaling pathway    A series of molecular signals initiated by the cross-linking of an antigen receptor on a B cell.
    GO:0038096    Fc-gamma receptor signaling pathway involved in phagocytosis    An Fc-gamma receptor signaling pathway that contributes to the endocytic engulfment of external particulate material by phagocytes.
    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: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:0042742    defense response to bacterium    Reactions triggered in response to the presence of a bacterium that act to protect the cell or organism.
    GO:0045087    innate immune response    Innate immune responses are defense responses mediated by germline encoded components that directly recognize components of potential pathogens.
    GO:0006911    phagocytosis, engulfment    The internalization of bacteria, immune complexes and other particulate matter or of an apoptotic cell by phagocytosis, including the membrane and cytoskeletal processes required, which involves one of three mechanisms: zippering of pseudopods around a target via repeated receptor-ligand interactions, sinking of the target directly into plasma membrane of the phagocytosing cell, or induced uptake via an enhanced membrane ruffling of the phagocytosing cell similar to macropinocytosis.
    GO:0006910    phagocytosis, recognition    The initial step in phagocytosis involving adhesion to bacteria, immune complexes and other particulate matter, or an apoptotic cell and based on recognition of factors such as bacterial cell wall components, opsonins like complement and antibody or protein receptors and lipids like phosphatidyl serine, and leading to intracellular signaling in the phagocytosing cell.
    GO:0050871    positive regulation of B cell activation    Any process that activates or increases the frequency, rate or extent of B cell activation.
    GO:0006508    proteolysis    The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
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:0009897    external side of plasma membrane    The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
    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:0042571    immunoglobulin complex, circulating    An immunoglobulin complex that is secreted into extracellular space and found in mucosal areas or other tissues or circulating in the blood or lymph. In its canonical form, a circulating immunoglobulin complex is composed of two identical heavy chains and two identical light chains, held together by disulfide bonds. Some forms of are polymers of the basic structure and contain additional components such as J-chain and the secretory component.

Chain C   (FCG3A_HUMAN | P08637)
molecular function
    GO:0019864    IgG binding    Interacting selectively and non-covalently with an immunoglobulin of an IgG isotype.
biological process
    GO:0038096    Fc-gamma receptor signaling pathway involved in phagocytosis    An Fc-gamma receptor signaling pathway that contributes to the endocytic engulfment of external particulate material by phagocytes.
    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: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.
cellular component
    GO:0009897    external side of plasma membrane    The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
    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: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.

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 Related Entries

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

UniProtKB/Swiss-Prot
        FCG3A_HUMAN | P086373ay4 3sgj 3wn5 5bw7 5d6d
        IGHG1_HUMAN | P018571aj7 1aqk 1axs 1bey 1d5b 1d5i 1d6v 1dfb 1dn2 1e4k 1fc1 1fc2 1fcc 1gaf 1h3t 1h3u 1h3v 1h3w 1h3x 1h3y 1hkl 1hzh 1i7z 1l6x 1n7m 1op3 1oqo 1oqx 1pg7 1t83 1t89 1vge 2dts 2gj7 2i5y 2iwg 2j6e 2jb5 2jb6 2o5x 2o5y 2o5z 2osl 2qad 2ql1 2qqk 2qql 2qqn 2qr0 2r56 2rcj 2rcs 2vxq 2wah 3agv 3ave 3ay4 3b2u 3b2v 3bdy 3be1 3bky 3bn9 3bqu 3c08 3c09 3c2s 3cfj 3cfk 3csy 3d0l 3d0v 3d6g 3d85 3dj9 3dnk 3do3 3dro 3drq 3dvg 3dvn 3eyf 3eyo 3eyq 3fjt 3mcl 3o11 3ry6 3s7g 3sgj 3tv3 3twc 3tyg 3u0w 3u7w 3u7y 3v7m 3v8c 3v95 3wjj 3wjl 3wkn 3wn5 4acp 4b7i 4bm7 4bsv 4bsw 4byh 4cdh 4d9q 4d9r 4dag 4dz8 4eow 4hix 4j12 4ku1 4lld 4llm 4llq 4n0u 4nqs 4nqt 4nqu 4nwt 4nwu 4o4y 4o51 4q6y 4q74 4q7d 4w4n 4w4o 4wi2 4wi3 4wi4 4wi5 4wi6 4wi7 4wi8 4wi9 4x4m 4x98 4x99 4xmp 4xny 4xnz 4xxd 4zne 5bw7 5c7k 5d4q 5d6d 5di8 5dj0 5dj2 5dj6 5dj8 5dja 5djc 5djd 5djx 5djy 5djz 5dk0 5dk2 5dvk 5dvl 5dvm 5dvn 5dvo 5gsq 5hsf 5hy9 5hye 5hyf 5hyi 5iq7 5iq9 5iw3 5iw6 5jih 5jii 5jik 5k33 5k8d 5kwg 5m3v 5v43 5v4e

(-) Related Entries Specified in the PDB File

3sgj