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(-) Description

Title :  CRYSTAL STRUCTURE OF THE 1E9 LEUH47TRP/ARGH100TRP FAB 5-BETA-ANDROSTANE-3,17-DIONE COMPLEX
 
Authors :  P. Verdino, I. A. Wilson
Date :  06 Dec 06  (Deposition) - 18 Dec 07  (Release) - 25 Dec 13  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.40
Chains :  Asym. Unit :  H,L
Biol. Unit 1:  H,L  (1x)
Biol. Unit 2:  H,L  (2x)
Biol. Unit 3:  H (2x),L (2x)
Keywords :  Immunoglobulin, Chimeric Fab, Antibody Engineering, Evolution Of Ligand Recognition, Immune System (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  P. Verdino, C. Aldag, D. Hilvert, I. A. Wilson
Closely Related Antibody Receptors Exploit Fundamentally Different Strategies For Steroid Recognition.
Proc. Natl. Acad. Sci. Usa V. 105 11725 2008
PubMed-ID: 18689687  |  Reference-DOI: 10.1073/PNAS.0801783105

(-) Compounds

Molecule 1 - CHIMERIC ANTIBODY FAB 1E9-DB3
    Chains: L
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: P4XH-1E9
    Expression System Strain: TOPP2
    Expression System Taxid: 562
    Expression System Vector Type: PLASMID
    Fragment: LIGHT CHAIN
    Mutation: YES
    Organism Common: HOUSE MOUSE, HUMAN
    Organism Scientific: MUS MUSCULUS, HOMO SAPIENS
    Organism Taxid: 10090,9606
    Strain: ,
 
Molecule 2 - CHIMERIC ANTIBODY FAB 1E9-DB3
    Chains: H
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: P4XH-1E9
    Expression System Strain: TOPP2
    Expression System Taxid: 562
    Expression System Vector Type: PLASMID
    Fragment: HEAVY CHAIN
    Mutation: YES
    Organism Common: HOUSE MOUSE, HUMAN
    Organism Scientific: MUS MUSCULUS, HOMO SAPIENS
    Organism Taxid: 10090,9606
    Strain: ,

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit : HL
Biological Unit 1 (1x): HL
Biological Unit 2 (2x): HL
Biological Unit 3 (2x): H (2x)L (2x)

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 24)

Asymmetric Unit (2, 24)
No.NameCountTypeFull Name
1ANO1Ligand/Ion5-BETA-ANDROSTANE-3,17-DIONE
2SO423Ligand/IonSULFATE ION
Biological Unit 1 (2, 24)
No.NameCountTypeFull Name
1ANO1Ligand/Ion5-BETA-ANDROSTANE-3,17-DIONE
2SO423Ligand/IonSULFATE ION
Biological Unit 2 (2, 48)
No.NameCountTypeFull Name
1ANO2Ligand/Ion5-BETA-ANDROSTANE-3,17-DIONE
2SO446Ligand/IonSULFATE ION
Biological Unit 3 (2, 28)
No.NameCountTypeFull Name
1ANO2Ligand/Ion5-BETA-ANDROSTANE-3,17-DIONE
2SO426Ligand/IonSULFATE ION

(-) Sites  (24, 24)

Asymmetric Unit (24, 24)
No.NameEvidenceResiduesDescription
01AC1SOFTWAREPRO L:8 , LEU L:9 , SER L:10 , SER L:156BINDING SITE FOR RESIDUE SO4 L 302
02AC2SOFTWAREGLN L:27 , SER L:27ABINDING SITE FOR RESIDUE SO4 L 304
03AC3SOFTWARESER L:52 , ASN L:53 , ARG L:54 , ASP L:60 , LYS L:188BINDING SITE FOR RESIDUE SO4 L 305
04AC4SOFTWAREHIS L:93 , PHE L:94BINDING SITE FOR RESIDUE SO4 L 308
05AC5SOFTWARELYS H:13 , SER H:115 , HOH H:360 , SER L:202BINDING SITE FOR RESIDUE SO4 L 311
06AC6SOFTWAREPRO L:59 , ARG L:61 , GLU L:81BINDING SITE FOR RESIDUE SO4 L 312
07AC7SOFTWAREGLN H:105 , GLN L:42 , SER L:43 , LYS L:45 , HOH L:390 , HOH L:401 , HOH L:402BINDING SITE FOR RESIDUE SO4 L 314
08AC8SOFTWAREGLU H:56 , SER H:57 , ARG L:211BINDING SITE FOR RESIDUE SO4 L 316
09AC9SOFTWAREGLY H:169 , HIS H:172 , SO4 H:317 , ASN L:138 , ASP L:170 , HOH L:350BINDING SITE FOR RESIDUE SO4 L 319
10BC1SOFTWARESER L:114 , ASN L:138 , HOH L:327 , HOH L:407BINDING SITE FOR RESIDUE SO4 L 322
11BC2SOFTWARETYR H:27 , MET H:28 , TYR H:32 , HOH H:337BINDING SITE FOR RESIDUE SO4 H 301
12BC3SOFTWAREGLN H:179 , SER H:180 , HOH H:357 , GLN L:160BINDING SITE FOR RESIDUE SO4 H 303
13BC4SOFTWAREVAL H:2 , MET H:28 , ASN H:31 , ARG H:94 , TYR H:102BINDING SITE FOR RESIDUE SO4 H 306
14BC5SOFTWAREASN H:84 , SER H:112 , SER H:113 , HOH H:327 , HOH H:344 , HOH H:398 , ARG L:108 , ALA L:111BINDING SITE FOR RESIDUE SO4 H 307
15BC6SOFTWAREASP H:220 , LYS H:221 , LYS H:222BINDING SITE FOR RESIDUE SO4 H 309
16BC7SOFTWAREGLY H:118BINDING SITE FOR RESIDUE SO4 H 310
17BC8SOFTWAREGLU H:16 , THR H:17BINDING SITE FOR RESIDUE SO4 H 313
18BC9SOFTWAREARG H:66 , LYS H:83 , GLU H:85BINDING SITE FOR RESIDUE SO4 H 315
19CC1SOFTWARESER H:168 , GLY H:169 , HOH H:380 , HOH H:410 , LYS L:169 , SO4 L:319BINDING SITE FOR RESIDUE SO4 H 317
20CC2SOFTWARELYS H:83 , ASN H:84 , GLU H:85 , HOH H:373BINDING SITE FOR RESIDUE SO4 H 318
21CC3SOFTWAREGLN H:81 , ASN L:210BINDING SITE FOR RESIDUE SO4 H 320
22CC4SOFTWAREGLU H:72 , THR H:73 , SER H:74BINDING SITE FOR RESIDUE SO4 H 321
23CC5SOFTWARESER H:7 , GLY H:8 , LYS H:213 , HOH H:394BINDING SITE FOR RESIDUE SO4 H 323
24CC6SOFTWAREASN H:35 , TRP H:50 , GLY H:95 , TRP H:100 , ASN L:28 , SER L:91BINDING SITE FOR RESIDUE ANO H 501

(-) SS Bonds  (4, 4)

Asymmetric Unit
No.Residues
1H:22 -H:92
2H:142 -H:208
3L:23 -L:88
4L:134 -L:194

(-) Cis Peptide Bonds  (5, 5)

Asymmetric Unit
No.Residues
1Thr L:7 -Pro L:8
2Phe L:94 -Phe L:95
3Tyr L:140 -Pro L:141
4Phe H:148 -Pro H:149
5Glu H:150 -Pro H:151

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (2, 2)

Asymmetric Unit (2, 2)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_066403W41RIGKC_HUMANDisease (IGKCD)  ---LW148R
2UniProtVAR_003897V84LIGKC_HUMANPolymorphism  ---LV191L
  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)
Biological Unit 1 (2, 2)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_066403W41RIGKC_HUMANDisease (IGKCD)  ---LW148R
2UniProtVAR_003897V84LIGKC_HUMANPolymorphism  ---LV191L
  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)
Biological Unit 2 (2, 4)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_066403W41RIGKC_HUMANDisease (IGKCD)  ---LW148R
2UniProtVAR_003897V84LIGKC_HUMANPolymorphism  ---LV191L
  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)
Biological Unit 3 (2, 4)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_066403W41RIGKC_HUMANDisease (IGKCD)  ---LW148R
2UniProtVAR_003897V84LIGKC_HUMANPolymorphism  ---LV191L
  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

(-) PROSITE Motifs  (1, 1)

Asymmetric Unit (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1IG_MHCPS00290 Immunoglobulins and major histocompatibility complex proteins signature.IGKC_HUMAN85-91  1L:192-198
Biological Unit 1 (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1IG_MHCPS00290 Immunoglobulins and major histocompatibility complex proteins signature.IGKC_HUMAN85-91  1L:192-198
Biological Unit 2 (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1IG_MHCPS00290 Immunoglobulins and major histocompatibility complex proteins signature.IGKC_HUMAN85-91  2L:192-198
Biological Unit 3 (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1IG_MHCPS00290 Immunoglobulins and major histocompatibility complex proteins signature.IGKC_HUMAN85-91  2L:192-198

(-) Exons   (0, 0)

(no "Exon" information available for 2O5Z)

(-) 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 H from PDB  Type:PROTEIN  Length:219
                                                                                                                                                                                                                                                            
               SCOP domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains 2o5zH01 H:1-113 Immunoglobulins                                                                                        2o5zH02 H:114-227 Immunoglobulins                                                                    CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..eeee...eee.....eeeeeeee..hhhhheeeeeee.....eeeeeee......eee.hhhh..eeeeee....eeeeee...hhhhheeeeeeeee....eeeee...eeeee........eeeee..........eeeeeeeeeee.....eeee.hhh....eee...ee.....eeeeeeeeee.hhhhh..eeeeeeehhhheeeeeee.. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                2o5z H    1 QVQLVQSGPELKKPGETVKISCKASGYMFTNYGMNWVKQAPGKALKWMGWINPYTGESTFADDFKGRFAFFLETSATTAYLQINNLKNEDTATYFCARGTTIVWAMDYWGQGTSVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEP  227
                                    10        20        30        40        50  |     59        69        79   |||  86        96    || 104       114       124       136       146       157|      172       183       193  |||| 206       216      || 
                                                                              52A                            82A||               100A|                              133|               154|||    169|       181|          196|||                  223| 
                                                                                                              82B|                100B                               136                156||     171        183           199||                   226 
                                                                                                               82C                                                                       157|                               200|                       
                                                                                                                                                                                          162                                202                       


Chain L from PDB  Type:PROTEIN  Length:218
 aligned with IGKC_HUMAN | P01834 from UniProtKB/Swiss-Prot  Length:107

    Alignment length:218
                                                                                                                                            1                                                                                                         
                                     -         -         -         -         -         -         -         -         -         -         -  |      8        18        28        38        48        58        68        78        88        98        
          IGKC_HUMAN      - ----------------------------------------------------------------------------------------------------------------RTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGE  106
               SCOP domains d2o5zl1 L:1-107 automated matches                                                                               d2o5zl2 L:108-213 automated matches                                                                        SCOP domains
               CATH domains 2o5zL01 L:1-107 Immunoglobulins                                                                                 2o5zL02 L:108-211 Immunoglobulins                                                                       -- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...eeee..eeeee....eeeeeee............eeeeee......eeeee...ee.......eeeeee..eeeeee...hhhhheeeeeee......ee...eeeeee......eeeee..hhhhhh..eeeeeeeeeee.....eeeeee..ee....eeeee.........eeeeeeeeeehhhhh...eeeeeee.......eeeeee... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------R------------------------------------------L---------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------IG_MHC --------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                2o5z L    1 ELVMTQTPLSLPVSLGDQASISCRSSQSLVHSNGNTYLHWYLQKPGQSPKFLIYKVSNRFSGVPDRFSGSGSGTDFILKISRVEAEDLGVYFCFQSTHFFPTFGGGTKLEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGE  213
                                    10        20       27C||      35        45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205        
                                                     27A||||                                                                                                                                                                                          
                                                      27B|||                                                                                                                                                                                          
                                                       27C||                                                                                                                                                                                          
                                                        27D|                                                                                                                                                                                          
                                                         27E                                                                                                                                                                                          


Chain L from PDB  Type:PROTEIN  Length:218
 aligned with KV2A7_MOUSE | P01631 from UniProtKB/Swiss-Prot  Length:113

    Alignment length:218
                                                                                                                                          113                                                                                                         
                                    10        20        30        40        50        60        70        80        90       100       110  |      -         -         -         -         -         -         -         -         -         -        
         KV2A7_MOUSE      1 DVVMTQTPLSLPVSLGDQASISCRSSQSLVHSNGNTYLNWYLQKAGQSPKLLIYKVSNRFSGVPDRFSGSGSGTDFTLKISRVEAEDLGIYFCSQTTHVPPTFGGGTKLEIKR---------------------------------------------------------------------------------------------------------    -
               SCOP domains d2o5zl1 L:1-107 automated matches                                                                               d2o5zl2 L:108-213 automated matches                                                                        SCOP domains
               CATH domains 2o5zL01 L:1-107 Immunoglobulins                                                                                 2o5zL02 L:108-211 Immunoglobulins                                                                       -- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...eeee..eeeee....eeeeeee............eeeeee......eeeee...ee.......eeeeee..eeeeee...hhhhheeeeeee......ee...eeeeee......eeeee..hhhhhh..eeeeeeeeeee.....eeeeee..ee....eeeee.........eeeeeeeeeehhhhh...eeeeeee.......eeeeee... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------R------------------------------------------L---------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                2o5z L    1 ELVMTQTPLSLPVSLGDQASISCRSSQSLVHSNGNTYLHWYLQKPGQSPKFLIYKVSNRFSGVPDRFSGSGSGTDFILKISRVEAEDLGVYFCFQSTHFFPTFGGGTKLEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGE  213
                                    10        20       27C||      35        45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205        
                                                     27A||||                                                                                                                                                                                          
                                                      27B|||                                                                                                                                                                                          
                                                       27C||                                                                                                                                                                                          
                                                        27D|                                                                                                                                                                                          
                                                         27E
   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, 2)

Asymmetric Unit
(-)
Class: All beta proteins (24004)

(-) CATH Domains  (1, 4)

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

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2O5Z)

(-) Gene Ontology  (26, 46)

Asymmetric Unit(hide GO term definitions)
Chain L   (KV2A7_MOUSE | P01631)
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.

Chain L   (IGKC_HUMAN | P01834)
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: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:0038095    Fc-epsilon receptor signaling pathway    A series of molecular signals initiated by the binding of the Fc portion of immunoglobulin E (IgE) to an Fc-epsilon receptor on the surface of a signal-receiving cell, and ending with regulation of a downstream cellular process, e.g. transcription. The Fc portion of an immunoglobulin is its C-terminal constant region.
    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:0006955    immune response    Any immune system process that functions in the calibrated response of an organism to a potential internal or invasive threat.
    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.
    GO:0006898    receptor-mediated endocytosis    An endocytosis process in which cell surface receptors ensure specificity of transport. A specific receptor on the cell surface binds tightly to the extracellular macromolecule (the ligand) that it recognizes; the plasma-membrane region containing the receptor-ligand complex then undergoes endocytosis, forming a transport vesicle containing the receptor-ligand complex and excluding most other plasma-membrane proteins. Receptor-mediated endocytosis generally occurs via clathrin-coated pits and vesicles.
    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:0001895    retina homeostasis    A tissue homeostatic process involved in the maintenance of an internal equilibrium within the retina of the eye, including control of cellular proliferation and death and control of metabolic function.
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.
    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
        IGHG1_HUMAN | P01857: 1aj7 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 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 3sgk 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
        IGKC_HUMAN | P01834: 1a4j 1a4k 1cly 1d5b 1d5i 1d6v 1dfb 1gaf 1hez 1hkl 1hzh 1i7z 1mim 1n0x 1om3 1op3 1op5 1ucb 2ny7 2o5x 2o5y 2qqk 2qql 2qqn 2qsc 2r56 2rfx 2vxq 3b2u 3b2v 3bdy 3be1 3bky 3bn9 3bqu 3c08 3c09 3cfj 3cfk 3csy 3d0l 3d85 3dvg 3dvn 3eyf 3eyo 3eyq 3iu3 3o11 3qct 3qcu 3qcv 3ru8 3u0w 3u7w 3u7y 3vh8 3wuw 3x11 3x12 4d3c 4d9r 4hix 4nm4 4nm8 4xmp 4xny 4xnz 4xxd 4ydv 5b38 5b39 5c7k 5esv 5esz 5ewi 5veb 5viy
        KV2A7_MOUSE | P01631: 1bfv 1cfv 1dlf 1maj 1mak 1n4x 1svz 1wz1 2bfv 2dlf 2hkf 2hkh 2ipt 2iqa 2o5x 2o5y 2r0w 2vq1

(-) Related Entries Specified in the PDB File

2o5x 1E9-DB3 HYBRID FAB APO FORM
2o5y CRYSTAL STRUCTURE OF THE 1E9-DB3 HYBRID FAB PROGESTERONE COMPLEX