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(-) Description

Title :  CRYSTAL STRUCTURE OF VON WILLEBRAND FACTOR A1 DOMAIN COMPLEXED WITH SNAKE VENOM BITISCETIN
 
Authors :  N. Maita, K. Nishio, E. Nishimoto, T. Matsui, Y. Shikamoto, T. Morita, J. E. Sadler, H. Mizuno
Date :  22 May 03  (Deposition) - 30 Sep 03  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.85
Chains :  Asym./Biol. Unit :  A,B,C
Keywords :  C-Type Lectin Heterodimer, Toxin/Blood Clotting Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  N. Maita, K. Nishio, E. Nishimoto, T. Matsui, Y. Shikamoto, T. Morita, J. E. Sadler, H. Mizuno
Crystal Structure Of Von Willebrand Factor A1 Domain Complexed With Snake Venom, Bitiscetin. Insight Into Glycoprotein Ibalpha Binding Mechanism Induced By Snake Venom Proteins.
J. Biol. Chem. V. 278 37777 2003
PubMed-ID: 12851390  |  Reference-DOI: 10.1074/JBC.M305566200
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - BITISCETIN ALPHA CHAIN
    ChainsA
    Organism CommonPUFF ADDER
    Organism ScientificBITIS ARIETANS
    Organism Taxid8692
    SecretionVENOM
    SynonymALPHA-SUBUNIT
 
Molecule 2 - BITISCETIN BETA CHAIN
    ChainsB
    Organism CommonPUFF ADDER
    Organism ScientificBITIS ARIETANS
    Organism Taxid8692
    SecretionVENOM
    SynonymBETA-SUBUNIT
 
Molecule 3 - VON WILLEBRAND FACTOR
    ChainsC
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidPET11B
    Expression System StrainBL21(DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    FragmentA1 DOMAIN
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymVWF

 Structural Features

(-) Chains, Units

  123
Asymmetric/Biological Unit ABC

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (0, 0)

(no "Ligand,Modified Residues,Ions" information available for 1UEX)

(-) Sites  (0, 0)

(no "Site" information available for 1UEX)

(-) SS Bonds  (8, 8)

Asymmetric/Biological Unit
No.Residues
1A:4 -A:15
2A:32 -A:125
3A:79 -B:77
4A:100 -A:117
5B:4 -B:15
6B:32 -B:121
7B:98 -B:113
8C:509 -C:695

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1UEX)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (18, 18)

Asymmetric/Biological Unit (18, 18)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
01UniProtVAR_005791P1266LVWF_HUMANDisease (VWD2)61749370CP503L
02UniProtVAR_005792H1268DVWF_HUMANDisease (VWD2)61749371CH505D
03UniProtVAR_067340C1272FVWF_HUMANDisease (VWD2)63524161CC509F
04UniProtVAR_005793C1272RVWF_HUMANDisease (VWD2)61749372CC509R
05UniProtVAR_005794R1306WVWF_HUMANDisease (VWD2)61749384CR543W
06UniProtVAR_005795R1308CVWF_HUMANDisease (VWD2)61749387CR545C
07UniProtVAR_005796W1313CVWF_HUMANDisease (VWD2)61749392CW550C
08UniProtVAR_005797V1314LVWF_HUMANDisease (VWD2)61749393CV551L
09UniProtVAR_005798V1316MVWF_HUMANDisease (VWD2)61749397CV553M
10UniProtVAR_005799V1318LVWF_HUMANDisease (VWD2)  ---CV555L
11UniProtVAR_005800G1324SVWF_HUMANDisease (VWD2)61749398CG561S
12UniProtVAR_005801R1341QVWF_HUMANDisease (VWD2)61749403CR578Q
13UniProtVAR_005802R1374CVWF_HUMANDisease (VWD2)61750071CR611C
14UniProtVAR_005803R1374HVWF_HUMANDisease (VWD2)61750072CR611H
15UniProtVAR_005804T1381AVWF_HUMANPolymorphism216311CA618A
16UniProtVAR_005805R1399HVWF_HUMANPolymorphism216312CR636H
17UniProtVAR_005806L1460VVWF_HUMANDisease (VWD2)61750088CL697V
18UniProtVAR_005807A1461VVWF_HUMANDisease (VWD2)61750089CA698V

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

(-) PROSITE Motifs  (2, 3)

Asymmetric/Biological Unit (2, 3)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1C_TYPE_LECTIN_2PS50041 C-type lectin domain profile.SLB_BITAR11-122  1B:11-122
SLA_BITAR11-126  1A:11-126
2VWFAPS50234 VWFA domain profile.VWF_HUMAN1498-1665
1277-1453
1691-1871
  1-
C:514-690
-

(-) Exons   (1, 1)

Asymmetric/Biological Unit (1, 1)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1ENST000002614051ENSE00001184496chr12:6233836-6233587250VWF_HUMAN-00--
1.2ENST000002614052ENSE00001653826chr12:6232362-623230855VWF_HUMAN1-19190--
1.4ENST000002614054ENSE00001261893chr12:6230504-6230340165VWF_HUMAN19-74560--
1.5ENST000002614055ENSE00001261546chr12:6220134-6220032103VWF_HUMAN74-108350--
1.6ENST000002614056ENSE00002152539chr12:6219748-6219540209VWF_HUMAN108-178710--
1.7aENST000002614057aENSE00001676171chr12:6204750-6204626125VWF_HUMAN178-219420--
1.8ENST000002614058ENSE00001682720chr12:6184717-6184501217VWF_HUMAN220-292730--
1.9ENST000002614059ENSE00001640051chr12:6182907-6182785123VWF_HUMAN292-333420--
1.10ENST0000026140510ENSE00001656280chr12:6181608-6181497112VWF_HUMAN333-370380--
1.11ENST0000026140511ENSE00001700039chr12:6180509-618046347VWF_HUMAN370-386170--
1.12ENST0000026140512ENSE00001674584chr12:6174439-6174303137VWF_HUMAN386-431460--
1.13ENST0000026140513ENSE00001645253chr12:6173550-6173412139VWF_HUMAN432-478470--
1.14ENST0000026140514ENSE00001679915chr12:6172220-6172120101VWF_HUMAN478-511340--
1.15ENST0000026140515ENSE00001640163chr12:6167210-6167015196VWF_HUMAN512-577660--
1.16ENST0000026140516ENSE00001727074chr12:6166238-6166023216VWF_HUMAN577-649730--
1.17bENST0000026140517bENSE00000936967chr12:6161949-6161709241VWF_HUMAN649-729810--
1.18ENST0000026140518ENSE00000936968chr12:6155983-615588995VWF_HUMAN729-761330--
1.19ENST0000026140519ENSE00000936969chr12:6153617-6153457161VWF_HUMAN761-814540--
1.20ENST0000026140520ENSE00000936970chr12:6145657-6145554104VWF_HUMAN815-849350--
1.21ENST0000026140521ENSE00000936971chr12:6143992-6143854139VWF_HUMAN849-895470--
1.22ENST0000026140522ENSE00000936972chr12:6140744-6140610135VWF_HUMAN896-940450--
1.23ENST0000026140523ENSE00000936973chr12:6138654-6138508147VWF_HUMAN941-989490--
1.24ENST0000026140524ENSE00000936974chr12:6135212-6135072141VWF_HUMAN990-1036470--
1.25ENST0000026140525ENSE00001731504chr12:6134859-6134746114VWF_HUMAN1037-1074380--
1.26ENST0000026140526ENSE00000936976chr12:6132953-6132797157VWF_HUMAN1075-1127530--
1.27ENST0000026140527ENSE00001792722chr12:6132064-6131906159VWF_HUMAN1127-1180540--
1.28ENST0000026140528ENSE00001679248chr12:6131201-6131066136VWF_HUMAN1180-1225460--
1.29ENST0000026140529ENSE00001749068chr12:6128909-61275311379VWF_HUMAN1225-16854611C:501-702202
1.30ENST0000026140530ENSE00001676963chr12:6126036-6125920117VWF_HUMAN1685-1724400--
1.31ENST0000026140531ENSE00001646337chr12:6125822-6125682141VWF_HUMAN1724-1771480--
1.32ENST0000026140532ENSE00001603271chr12:6125398-6125255144VWF_HUMAN1771-1819490--
1.33ENST0000026140533ENSE00000936983chr12:6122811-6122647165VWF_HUMAN1819-1874560--
1.34ENST0000026140534ENSE00001761241chr12:6121296-612125344VWF_HUMAN1874-1888150--
1.35ENST0000026140535ENSE00001622286chr12:6120960-6120783178VWF_HUMAN1889-1948600--
1.36ENST0000026140536ENSE00001261636chr12:6105388-6105168221VWF_HUMAN1948-2021740--
1.37ENST0000026140537ENSE00000866874chr12:6103773-6103581193VWF_HUMAN2022-2086650--
1.38ENST0000026140538ENSE00000866873chr12:6103369-6103028342VWF_HUMAN2086-22001150--
1.39ENST0000026140539ENSE00001328745chr12:6101184-6100985200VWF_HUMAN2200-2266670--
1.40ENST0000026140540ENSE00001261609chr12:6094831-6094729103VWF_HUMAN2267-2301350--
1.41ENST0000026140541ENSE00001261603chr12:6094285-609421175VWF_HUMAN2301-2326260--
1.42ENST0000026140542ENSE00000866869chr12:6092420-6092316105VWF_HUMAN2326-2361360--
1.43ENST0000026140543ENSE00001309185chr12:6091157-6090952206VWF_HUMAN2361-2429690--
1.44ENST0000026140544ENSE00000866867chr12:6085426-6085277150VWF_HUMAN2430-2479500--
1.45ENST0000026140545ENSE00001261579chr12:6080875-6080765111VWF_HUMAN2480-2516370--
1.46ENST0000026140546ENSE00001316394chr12:6078557-6078377181VWF_HUMAN2517-2577610--
1.47ENST0000026140547ENSE00000866864chr12:6077333-607729341VWF_HUMAN2577-2590140--
1.48ENST0000026140548ENSE00001289624chr12:6076768-6076652117VWF_HUMAN2591-2629390--
1.49ENST0000026140549ENSE00001312819chr12:6062760-606266299VWF_HUMAN2630-2662330--
1.50ENST0000026140550ENSE00001326641chr12:6061685-6061557129VWF_HUMAN2663-2705430--
1.51ENST0000026140551ENSE00001307387chr12:6061049-606101040VWF_HUMAN2706-2719140--
1.52aENST0000026140552aENSE00001293437chr12:6059049-605895298VWF_HUMAN2719-2751330--
1.53bENST0000026140553bENSE00001314535chr12:6058369-6058040330VWF_HUMAN2752-2813620--

(-) 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:125
 aligned with SLA_BITAR | Q7LZK5 from UniProtKB/Swiss-Prot  Length:131

    Alignment length:125
                                    12        22        32        42        52        62        72        82        92       102       112       122     
           SLA_BITAR      3 GCLPDWSSYKGHCYKVFKKVGTWEDAEKFCVENSGHLASIDSKEEADFVTKLASQTLTKFVYDAWIGLRDESKTQQCSPQWTDGSSVVYENVDEPTKCFGLDVHTEYRTWTDLPCGEKNPFICKS  127
               SCOP domains d1uexa_ A: Snake coagglutinin alpha chain                                                                                     SCOP domains
               CATH domains 1uexA00 A:3-127 Mannose-Binding Protein A, subunit A                                                                          CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ......eee..eeeeeeeeeehhhhhhhhhhh...ee....hhhhhhhhhhhhhhhh......eeeeeee...........................eeee.hhhh...eeee.....eeeeeee Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (2) --------C_TYPE_LECTIN_2  PDB: A:11-126 UniProt: 11-126                                                                      - PROSITE (2)
                 Transcript ----------------------------------------------------------------------------------------------------------------------------- Transcript
                1uex A    3 GCLPDWSSYKGHCYKVFKKVGTWEDAEKFCVENSGHLASIDSKEEADFVTKLASQTLTKFVYDAWIGLRDESKTQQCSPQWTDGSSVVYENVDEPTKCFGLDVHTEYRTWTDLPCGEKNPFICKS  127
                                    12        22        32        42        52        62        72        82        92       102       112       122     

Chain B from PDB  Type:PROTEIN  Length:123
 aligned with SLB_BITAR | Q7LZK8 from UniProtKB/Swiss-Prot  Length:125

    Alignment length:123
                                    12        22        32        42        52        62        72        82        92       102       112       122   
           SLB_BITAR      3 GCLPDWSSYKGHCYKVFKVEKTWADAEKFCKELVNGGHLMSVNSREEGEFISKLALEKMRIVLVWIGLSHFWRICPLRWTDGARLDYRALSDEPICFVAESFHNKWIQWTCNRKKSFVCKYRV  125
               SCOP domains d1uexb_ B: Snake coagglutinin beta chain                                                                                    SCOP domains
               CATH domains 1uexB00 B:3-125 Mannose-Binding Protein A, subunit A                                                                        CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ......eee..eeeeeeeeeehhhhhhhhhhh....ee.....hhhhhhhhhhhhhhh....eeeeeeeehhhhh.eee...............eeeeee.....eeeee....eeeeeeee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------C_TYPE_LECTIN_2  PDB: B:11-122 UniProt: 11-122                                                                  --- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------- Transcript
                1uex B    3 GCLPDWSSYKGHCYKVFKVEKTWADAEKFCKELVNGGHLMSVNSREEGEFISKLALEKMRIVLVWIGLSHFWRICPLRWTDGARLDYRALSDEPICFVAESFHNKWIQWTCNRKKSFVCKYRV  125
                                    12        22        32        42        52        62        72        82        92       102       112       122   

Chain C from PDB  Type:PROTEIN  Length:202
 aligned with VWF_HUMAN | P04275 from UniProtKB/Swiss-Prot  Length:2813

    Alignment length:202
                                  1273      1283      1293      1303      1313      1323      1333      1343      1353      1363      1373      1383      1393      1403      1413      1423      1433      1443      1453      1463  
           VWF_HUMAN   1264 EPPLHDFYCSRLLDLVFLLDGSSRLSEAEFEVLKAFVVDMMERLRISQKWVRVAVVEYHDGSHAYIGLKDRKRPSELRRIASQVKYAGSQVASTSEVLKYTLFQIFSKIDRPEASRITLLLMASQEPQRMSRNFVRYVQGLKKKKVIVIPVGIGPHANLKQIRLIEKQAPENKAFVLSSVDELEQQRDEIVSYLCDLAPEAP 1465
               SCOP domains d1uexc_ C: von Willebrand factor A1 domain, vWA1                                                                                                                                                           SCOP domains
               CATH domains 1uexC00 C:501-702  [code=3.40.50.410, no name defined]                                                                                                                                                     CATH domains
               Pfam domains -------------VWA-1uexC01 C:514-691                                                                                                                                                             ----------- Pfam domains
         Sec.struct. author ............eeeeeeee.....hhhhhhhhhhhhhhhhh........eeeeeeee...eeeee......hhhhhhhhhhh.........hhhhhhhhhhhh..........eeeeeeee..........hhhhhhhhhhhh.eeeeeeee.....hhhhhhhhhhh.....eee..hhhhhhhhhhhhhhhhh...... Sec.struct. author
             SAPs(SNPs) (1) --L-D---F---------------------------------W-C----CL-M-L-----S----------------Q--------------------------------C------A-----------------H------------------------------------------------------------VV---- SAPs(SNPs) (1)
             SAPs(SNPs) (2) --------R-----------------------------------------------------------------------------------------------------H------------------------------------------------------------------------------------------- SAPs(SNPs) (2)
                    PROSITE -------------VWFA  PDB: C:514-690 UniProt: 1277-1453                                                                                                                                          ------------ PROSITE
               Transcript 1 Exon 1.29  PDB: C:501-702 UniProt: 1225-1685 [INCOMPLETE]                                                                                                                                                  Transcript 1
                1uex C  501 EPPLHDFYCSRLLDLVFLLDGSSRLSEAEFEVLKAFVVDMMERLRISQKWVRVAVVEYHDGSHAYIGLKDRKRPSELRRIASQVKYAGSQVASTSEVLKYTLFQIFSKIDRPEASRIALLLMASQEPQRMSRNFVRYVQGLKKKKVIVIPVGIGPHANLKQIRLIEKQAPENKAFVLSSVDELEQQRDEIVSYLCDLAPEAP  702
                                   510       520       530       540       550       560       570       580       590       600       610       620       630       640       650       660       670       680       690       700  

   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, 3)

Asymmetric/Biological Unit

(-) CATH Domains  (2, 3)

Asymmetric/Biological Unit
(-)
Class: Alpha Beta (26913)

(-) Pfam Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Clan: vWA-like (60)
(-)
Family: VWA (50)

(-) Gene Ontology  (28, 30)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (SLA_BITAR | Q7LZK5)
cellular component
    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.

Chain B   (SLB_BITAR | Q7LZK8)
cellular component
    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.

Chain C   (VWF_HUMAN | P04275)
molecular function
    GO:0051087    chaperone binding    Interacting selectively and non-covalently with a chaperone protein, a class of proteins that bind to nascent or unfolded polypeptides and ensure correct folding or transport.
    GO:0005518    collagen binding    Interacting selectively and non-covalently with collagen, a group of fibrous proteins of very high tensile strength that form the main component of connective tissue in animals. Collagen is highly enriched in glycine (some regions are 33% glycine) and proline, occurring predominantly as 3-hydroxyproline (about 20%).
    GO:0042802    identical protein binding    Interacting selectively and non-covalently with an identical protein or proteins.
    GO:0019865    immunoglobulin binding    Interacting selectively and non-covalently with an immunoglobulin.
    GO:0005178    integrin binding    Interacting selectively and non-covalently with an integrin.
    GO:0002020    protease binding    Interacting selectively and non-covalently with any protease or peptidase.
    GO:0047485    protein N-terminus binding    Interacting selectively and non-covalently with a protein N-terminus, the end of any peptide chain at which the 2-amino (or 2-imino) function of a constituent amino acid is not attached in peptide linkage to another amino-acid residue.
    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:0042803    protein homodimerization activity    Interacting selectively and non-covalently with an identical protein to form a homodimer.
biological process
    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:0007597    blood coagulation, intrinsic pathway    A protein activation cascade that contributes to blood coagulation and consists of the interactions among high molecular weight kininogen, prekallikrein, and factor XII that lead to the activation of clotting factor X.
    GO:0007155    cell adhesion    The attachment of a cell, either to another cell or to an underlying substrate such as the extracellular matrix, via cell adhesion molecules.
    GO:0031589    cell-substrate adhesion    The attachment of a cell to the underlying substrate via adhesion molecules.
    GO:0030198    extracellular matrix organization    A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of an extracellular matrix.
    GO:0007599    hemostasis    The stopping of bleeding (loss of body fluid) or the arrest of the circulation to an organ or part.
    GO:0030168    platelet activation    A series of progressive, overlapping events triggered by exposure of the platelets to subendothelial tissue. These events include shape change, adhesiveness, aggregation, and release reactions. When carried through to completion, these events lead to the formation of a stable hemostatic plug.
    GO:0002576    platelet degranulation    The regulated exocytosis of secretory granules containing preformed mediators such as histamine and serotonin by a platelet.
    GO:0051260    protein homooligomerization    The process of creating protein oligomers, compounds composed of a small number, usually between three and ten, of identical component monomers. Oligomers may be formed by the polymerization of a number of monomers or the depolymerization of a large protein polymer.
    GO:0035902    response to immobilization stress    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 being rendered immobile.
    GO:0009611    response to wounding    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 stimulus indicating damage to the organism.
cellular component
    GO:0033093    Weibel-Palade body    A large, elongated, rod-shaped secretory granule characteristic of vascular endothelial cells that contain a number of structurally and functionally distinct proteins, of which the best characterized are von Willebrand factor (VWF) and P-selectin. Weibel-Palade bodies are formed from the trans-Golgi network in a process that depends on VWF, which is densely packed in a highly organized manner, and on coat proteins that remain associated with the granules. Upon cell stimulation, regulated exocytosis releases the contained proteins to the cell surface, where they act in the recruitment of platelets and leukocytes and in inflammatory and vasoactive responses.
    GO:0005783    endoplasmic reticulum    The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached).
    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:0031012    extracellular matrix    A structure lying external to one or more cells, which provides structural support for cells or tissues.
    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:0031091    platelet alpha granule    A secretory organelle found in blood platelets, which is unique in that it exhibits further compartmentalization and acquires its protein content via two distinct mechanisms: (1) biosynthesis predominantly at the megakaryocyte (MK) level (with some vestigial platelet synthesis) (e.g. platelet factor 4) and (2) endocytosis and pinocytosis at both the MK and circulating platelet levels (e.g. fibrinogen (Fg) and IgG).
    GO:0031093    platelet alpha granule lumen    The volume enclosed by the membrane of the platelet alpha granule.
    GO:0005578    proteinaceous extracellular matrix    A layer consisting mainly of proteins (especially collagen) and glycosaminoglycans (mostly as proteoglycans) that forms a sheet underlying or overlying cells such as endothelial and epithelial cells. The proteins are secreted by cells in the vicinity. An example of this component is found in Mus musculus.

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 Related Entries

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

UniProtKB/Swiss-Prot
        SLA_BITAR | Q7LZK51jwi
        SLB_BITAR | Q7LZK81jwi
        VWF_HUMAN | P042751ao3 1atz 1auq 1fe8 1fns 1ijb 1ijk 1m10 1oak 1sq0 1u0n 2adf 2mhp 2mhq 3gxb 3hxo 3hxq 3ppv 3ppw 3ppx 3ppy 3zqk 4c29 4c2a 4c2b 4dmu 4nt5 5bv8

(-) Related Entries Specified in the PDB File

1auq FREE-FORM OF VON WILLEBRAND FACTOR A1 DOMAIN
1jwi FREE-FORM OF BITISCETIN