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(-) Description

Title :  CRYSTAL STRUCTURE OF THE THROMBOSPONDIN-1 N-TERMINAL DOMAIN AT 1.45A RESOLUTION
 
Authors :  K. Tan, J. Wang, J. Lawler
Date :  24 Oct 05  (Deposition) - 17 Jan 06  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.45
Chains :  Asym./Biol. Unit :  A
Keywords :  Thrombospondin-1, Tsp-1, N-Terminal Tspn, Hbd, Sugar Binding Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  K. Tan, M. Duquette, J. H. Liu, R. Zhang, A. Joachimiak, J. H. Wang, J. Lawler
The Structures Of The Thrombospondin-1 N-Terminal Domain And Its Complex With A Synthetic Pentameric Heparin.
Structure V. 14 33 2006
PubMed-ID: 16407063  |  Reference-DOI: 10.1016/J.STR.2005.09.017
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - THROMBOSPONDIN-1
    ChainsA
    EngineeredYES
    Expression SystemDROSOPHILA MELANOGASTER
    Expression System Cell LineS2 CELL
    Expression System CommonFRUIT FLY
    Expression System Taxid7227
    Expression System Vector TypePMT/BIP/V5-HIS A
    FragmentN-TERMINAL DOMAIN
    GeneTHBS1, TSP, TSP1
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606

 Structural Features

(-) Chains, Units

  1
Asymmetric/Biological Unit A

Summary Information (see also Sequences/Alignments below)

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

(no "Ligand,Modified Residues,Ions" information available for 2ERF)

(-) Sites  (0, 0)

(no "Site" information available for 2ERF)

(-) SS Bonds  (1, 1)

Asymmetric/Biological Unit
No.Residues
1A:153 -A:214

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2ERF)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2ERF)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 2ERF)

(-) Exons   (2, 2)

Asymmetric/Biological Unit (2, 2)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1aENST000002603561aENSE00001948740chr15:39873127-39873429303TSP1_HUMAN-00--
1.2bENST000002603562bENSE00002162162chr15:39874030-3987412596TSP1_HUMAN1-23230--
1.3bENST000002603563bENSE00001792284chr15:39874394-39874953560TSP1_HUMAN23-2091871A:7-191185
1.4ENST000002603564ENSE00001758707chr15:39875818-3987589376TSP1_HUMAN210-235261A:192-21524
1.5ENST000002603565ENSE00001725099chr15:39876189-39876388200TSP1_HUMAN235-301670--
1.6ENST000002603566ENSE00001706898chr15:39876501-39876623123TSP1_HUMAN302-342410--
1.7ENST000002603567ENSE00001674053chr15:39877671-3987776494TSP1_HUMAN343-374320--
1.8bENST000002603568bENSE00001738791chr15:39879548-39879721174TSP1_HUMAN374-432590--
1.9aENST000002603569aENSE00001608072chr15:39880243-39880419177TSP1_HUMAN432-491600--
1.10bENST0000026035610bENSE00001783863chr15:39880727-39880900174TSP1_HUMAN491-549590--
1.11cENST0000026035611cENSE00001710663chr15:39881160-39881287128TSP1_HUMAN549-591430--
1.12ENST0000026035612ENSE00001794374chr15:39881403-39881555153TSP1_HUMAN592-642510--
1.13cENST0000026035613cENSE00000883769chr15:39882006-39882224219TSP1_HUMAN643-715730--
1.14ENST0000026035614ENSE00000883770chr15:39882717-39882824108TSP1_HUMAN716-751360--
1.15ENST0000026035615ENSE00000883771chr15:39883392-39883551160TSP1_HUMAN752-805540--
1.16ENST0000026035616ENSE00000883772chr15:39883706-39883824119TSP1_HUMAN805-844400--
1.17ENST0000026035617ENSE00000883773chr15:39884769-39885003235TSP1_HUMAN845-923790--
1.18aENST0000026035618aENSE00000883774chr15:39885201-39885428228TSP1_HUMAN923-999770--
1.19aENST0000026035619aENSE00000883775chr15:39885598-39885869272TSP1_HUMAN999-1089910--
1.19cENST0000026035619cENSE00000883776chr15:39886300-3988639798TSP1_HUMAN1090-1122330--
1.20ENST0000026035620ENSE00000883777chr15:39886502-39886641140TSP1_HUMAN1122-1169480--
1.21bENST0000026035621bENSE00000930951chr15:39887563-398911193557TSP1_HUMAN1169-117020--

(-) 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:209
 aligned with TSP1_HUMAN | P07996 from UniProtKB/Swiss-Prot  Length:1170

    Alignment length:209
                                    34        44        54        64        74        84        94       104       114       124       134       144       154       164       174       184       194       204       214       224         
           TSP1_HUMAN    25 GGDNSVFDIFELTGAARKGSGRRLVKGPDPSSPAFRIEDANLIPPVPDDKFQDLVDAVRAEKGFLLLASLRQMKKTRGTLLALERKDHSGQVFSVVSNGKAGTLDLSLTVQGKQHVVSVEEALLATGQWKSITLFVQEDRAQLYIDCEKMENAELDVPIQSVFTRDLASIARLRIAKGGVNDNFQGVLQNVRFVFGTTPEDILRNKGCS 233
               SCOP domains d2erfa_ A: Thrombospondin 1 N-terminal domain                                                                                                                                                                     SCOP domains
               CATH domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .....eeehhhhhh.......eeee........eeee.hhhhh...hhhhhhhhhhhhhhhheeeeeeeeee....eeeeeeeee.....eeeeeeee....eeeeeeee..eeeeeee.........eeeeeeeee..eeeeee...eeeeee...hhhhh...hhhhheeeee..........eeeeeeeee...hhhhhhhh.... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
               Transcript 1 Exon 1.3b  PDB: A:7-191 UniProt: 23-209 [INCOMPLETE]                                                                                                                                     Exon 1.4  PDB: A:192-215 Transcript 1
                 2erf A   7 GGDNSVFDIFELTGAARKGSGRRLVKGPDPSSPAFRIEDANLIPPVPDDKFQDLVDAVRTEKGFLLLASLRQMKKTRGTLLALERKDHSGQVFSVVSNGKAGTLDLSLTVQGKQHVVSVEEALLATGQWKSITLFVQEDRAQLYIDCEKMENAELDVPIQSVFTRDLASIARLRIAKGGVNDNFQGVLQNVRFVFGTTPEDILRNKGCS 215
                                    16        26        36        46        56        66        76        86        96       106       116       126       136       146       156       166       176       186       196       206         

   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  (1, 1)

Asymmetric/Biological Unit

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 2ERF)

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (89, 89)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (TSP1_HUMAN | P07996)
molecular function
    GO:0005509    calcium ion binding    Interacting selectively and non-covalently with calcium ions (Ca2+).
    GO:0070052    collagen V binding    Interacting selectively and non-covalently with a type V collagen trimer.
    GO:0050840    extracellular matrix binding    Interacting selectively and non-covalently with a component of the extracellular matrix.
    GO:0070051    fibrinogen binding    Interacting selectively and non-covalently with fibrinogen, a highly soluble hexameric glycoprotein complex that is found in blood plasma and is converted to fibrin by thrombin in the coagulation cascade.
    GO:0017134    fibroblast growth factor binding    Interacting selectively and non-covalently with a fibroblast growth factor.
    GO:0001968    fibronectin binding    Interacting selectively and non-covalently with a fibronectin, a group of related adhesive glycoproteins of high molecular weight found on the surface of animal cells, connective tissue matrices, and in extracellular fluids.
    GO:0008201    heparin binding    Interacting selectively and non-covalently with heparin, any member of a group of glycosaminoglycans found mainly as an intracellular component of mast cells and which consist predominantly of alternating alpha-(1->4)-linked D-galactose and N-acetyl-D-glucosamine-6-sulfate residues.
    GO:0042802    identical protein binding    Interacting selectively and non-covalently with an identical protein or proteins.
    GO:0005178    integrin binding    Interacting selectively and non-covalently with an integrin.
    GO:0043236    laminin binding    Interacting selectively and non-covalently with laminins, glycoproteins that are major constituents of the basement membrane of cells.
    GO:0030169    low-density lipoprotein particle binding    Interacting selectively and non-covalently with a low-density lipoprotein particle, a lipoprotein particle that is rich in cholesterol esters and low in triglycerides, is typically composed of APOB100 and APOE, and has a density of 1.02-1.06 g/ml and a diameter of between 20-25 nm.
    GO:0001786    phosphatidylserine binding    Interacting selectively and non-covalently with phosphatidylserine, a class of glycophospholipids in which a phosphatidyl group is esterified to the hydroxyl group of L-serine.
    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:0043394    proteoglycan binding    Interacting selectively and non-covalently with a proteoglycan, any glycoprotein in which the carbohydrate units are glycosaminoglycans.
    GO:0050431    transforming growth factor beta binding    Interacting selectively and non-covalently with TGF-beta, transforming growth factor beta, a multifunctional peptide that controls proliferation, differentiation and other functions in many cell types.
biological process
    GO:0000187    activation of MAPK activity    The initiation of the activity of the inactive enzyme MAP kinase (MAPK).
    GO:0048266    behavioral response to pain    Any process that results in a change in the behavior of an organism as a result of a pain stimulus. Pain stimuli cause activation of nociceptors, peripheral receptors for pain, include receptors which are sensitive to painful mechanical stimuli, extreme heat or cold, and chemical stimuli.
    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:0007050    cell cycle arrest    A regulatory process that halts progression through the cell cycle during one of the normal phases (G1, S, G2, M).
    GO:0016477    cell migration    The controlled self-propelled movement of a cell from one site to a destination guided by molecular cues. Cell migration is a central process in the development and maintenance of multicellular organisms.
    GO:0034605    cellular response to heat    Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a heat stimulus, a temperature stimulus above the optimal temperature for that organism.
    GO:0002544    chronic inflammatory response    Inflammation of prolonged duration (weeks or months) in which active inflammation, tissue destruction, and attempts at repair are proceeding simultaneously. Although it may follow acute inflammation, chronic inflammation frequently begins insidiously, as a low-grade, smoldering, often asymptomatic response.
    GO:0043652    engulfment of apoptotic cell    The removal of the apoptotic cell by phagocytosis, by a neighboring cell or by a phagocyte.
    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:0006955    immune response    Any immune system process that functions in the calibrated response of an organism to a potential internal or invasive threat.
    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:0016525    negative regulation of angiogenesis    Any process that stops, prevents, or reduces the frequency, rate or extent of angiogenesis.
    GO:0002581    negative regulation of antigen processing and presentation of peptide or polysaccharide antigen via MHC class II    Any process that stops, prevents, or reduces the frequency, rate, or extent of antigen processing and presentation of antigen (peptide or polysaccharide) via MHC class II.
    GO:0043066    negative regulation of apoptotic process    Any process that stops, prevents, or reduces the frequency, rate or extent of cell death by apoptotic process.
    GO:0043537    negative regulation of blood vessel endothelial cell migration    Any process that stops, prevents, or reduces the frequency, rate or extent of the migration of the endothelial cells of blood vessels.
    GO:0010754    negative regulation of cGMP-mediated signaling    Any process that decreases the rate, frequency or extent of cGMP-mediated signaling. cGMP-mediated signaling is a series of molecular signals in which a cell uses cyclic GMP to convert an extracellular signal into a response.
    GO:0001953    negative regulation of cell-matrix adhesion    Any process that stops, prevents, or reduces the rate or extent of cell adhesion to the extracellular matrix.
    GO:0043154    negative regulation of cysteine-type endopeptidase activity involved in apoptotic process    Any process that stops, prevents, or reduces the frequency, rate or extent of a cysteine-type endopeptidase activity involved in the apoptotic process.
    GO:0002605    negative regulation of dendritic cell antigen processing and presentation    Any process that stops, prevents, or reduces the frequency, rate, or extent of dendritic cell antigen processing and presentation.
    GO:2001027    negative regulation of endothelial cell chemotaxis    Any process that stops, prevents or reduces the frequency, rate or extent of endothelial cell chemotaxis.
    GO:0010596    negative regulation of endothelial cell migration    Any process that decreases the rate, frequency, or extent of the orderly movement of an endothelial cell into the extracellular matrix to form an endothelium.
    GO:0001937    negative regulation of endothelial cell proliferation    Any process that stops, prevents, or reduces the rate or extent of endothelial cell proliferation.
    GO:2001237    negative regulation of extrinsic apoptotic signaling pathway    Any process that stops, prevents or reduces the frequency, rate or extent of extrinsic apoptotic signaling pathway.
    GO:0051918    negative regulation of fibrinolysis    Any process that stops, prevents, or reduces the frequency, rate or extent of fibrinolysis, an ongoing process that solubilizes fibrin, resulting in the removal of small blood clots.
    GO:0040037    negative regulation of fibroblast growth factor receptor signaling pathway    Any process that stops, prevents, or reduces the frequency, rate or extent of fibroblast growth factor receptor signaling pathway activity.
    GO:0051895    negative regulation of focal adhesion assembly    Any process that stops, prevents, or reduces the frequency, rate or extent of focal adhesion assembly, the establishment and maturation of focal adhesions.
    GO:0032695    negative regulation of interleukin-12 production    Any process that stops, prevents, or reduces the frequency, rate, or extent of interleukin-12 production.
    GO:0010751    negative regulation of nitric oxide mediated signal transduction    Any process that decreases the rate, frequency or extent of nitric oxide mediated signal transduction. Nitric oxide mediated signal transduction is a series of molecular signals mediated by the detection of nitric oxide (NO).
    GO:0010748    negative regulation of plasma membrane long-chain fatty acid transport    Any process that decreases the rate, frequency or extent of plasma membrane long-chain fatty acid transport. Plasma membrane long-chain fatty acid transport is the directed movement of long-chain fatty acids across the plasma membrane.
    GO:0010757    negative regulation of plasminogen activation    Any process that decreases the rate, frequency or extent of plasminogen activation. Plasminogen activation is the process in which plasminogen is processed to plasmin.
    GO:0018149    peptide cross-linking    The formation of a covalent cross-link between or within protein chains.
    GO:0002576    platelet degranulation    The regulated exocytosis of secretory granules containing preformed mediators such as histamine and serotonin by a platelet.
    GO:0045766    positive regulation of angiogenesis    Any process that activates or increases angiogenesis.
    GO:0030194    positive regulation of blood coagulation    Any process that activates or increases the frequency, rate or extent of blood coagulation.
    GO:0043536    positive regulation of blood vessel endothelial cell migration    Any process that activates or increases the frequency, rate or extent of the migration of the endothelial cells of blood vessels.
    GO:0030335    positive regulation of cell migration    Any process that activates or increases the frequency, rate or extent of cell migration.
    GO:0050921    positive regulation of chemotaxis    Any process that activates or increases the frequency, rate or extent of the directed movement of a motile cell or organism in response to a specific chemical concentration gradient.
    GO:2000353    positive regulation of endothelial cell apoptotic process    Any process that activates or increases the frequency, rate or extent of endothelial cell apoptotic process.
    GO:0010595    positive regulation of endothelial cell migration    Any process that increases the rate, frequency, or extent of the orderly movement of an endothelial cell into the extracellular matrix to form an endothelium.
    GO:1902043    positive regulation of extrinsic apoptotic signaling pathway via death domain receptors    Any process that activates or increases the frequency, rate or extent of extrinsic apoptotic signaling pathway via death domain receptors.
    GO:0010763    positive regulation of fibroblast migration    Any process that increases the rate, frequency or extent of fibroblast cell migration. Fibroblast cell migration is accomplished by extension and retraction of a pseudopodium.
    GO:0043032    positive regulation of macrophage activation    Any process that stimulates, induces or increases the rate of macrophage activation.
    GO:0010759    positive regulation of macrophage chemotaxis    Any process that increases the rate, frequency or extent of macrophage chemotaxis. Macrophage chemotaxis is the movement of a macrophage in response to an external stimulus.
    GO:0042327    positive regulation of phosphorylation    Any process that activates or increases the frequency, rate or extent of addition of phosphate groups to a molecule.
    GO:0051897    positive regulation of protein kinase B signaling    Any process that activates or increases the frequency, rate or extent of protein kinase B signaling, a series of reactions mediated by the intracellular serine/threonine kinase protein kinase B.
    GO:2000379    positive regulation of reactive oxygen species metabolic process    Any process that activates or increases the frequency, rate or extent of reactive oxygen species metabolic process.
    GO:0030511    positive regulation of transforming growth factor beta receptor signaling pathway    Any process that activates or increases the frequency, rate or extent of TGF-beta receptor signaling pathway activity.
    GO:0032914    positive regulation of transforming growth factor beta1 production    Any process that activates or increases the frequency, rate, or extent of production of transforming growth factor-beta1.
    GO:0045727    positive regulation of translation    Any process that activates or increases the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of proteins by the translation of mRNA or circRNA.
    GO:0042535    positive regulation of tumor necrosis factor biosynthetic process    Any process that activates or increases the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of tumor necrosis factor, an inflammatory cytokine produced by macrophages/monocytes during acute inflammation and which is responsible for a diverse range of signaling events within cells, leading to necrosis or apoptosis.
    GO:0036066    protein O-linked fucosylation    The process of transferring a fucosyl group to a serine or threonine residues in a protein acceptor molecule, to form an O-linked protein-sugar linkage.
    GO:0030823    regulation of cGMP metabolic process    Any process that modulates the frequency, rate or extent of the chemical reactions and pathways involving cGMP.
    GO:0051592    response to calcium 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 calcium ion stimulus.
    GO:0042493    response to drug    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 drug stimulus. A drug is a substance used in the diagnosis, treatment or prevention of a disease.
    GO:0034976    response to endoplasmic reticulum stress    Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stress acting at the endoplasmic reticulum. ER stress usually results from the accumulation of unfolded or misfolded proteins in the ER lumen.
    GO:0009749    response to glucose    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 glucose stimulus.
    GO:0001666    response to hypoxia    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 lowered oxygen tension. Hypoxia, defined as a decline in O2 levels below normoxic levels of 20.8 - 20.95%, results in metabolic adaptation at both the cellular and organismal level.
    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:0006986    response to unfolded protein    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 an unfolded protein stimulus.
    GO:0002040    sprouting angiogenesis    The extension of new blood vessels from existing capillaries into avascular tissues resulting from the proliferation of blood vessel endothelial cells.
cellular component
    GO:0009986    cell surface    The external part of the cell wall and/or plasma membrane.
    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:0005788    endoplasmic reticulum lumen    The volume enclosed by the membranes of the endoplasmic reticulum.
    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: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: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:0005577    fibrinogen complex    A highly soluble, elongated protein complex found in blood plasma and involved in clot formation. It is converted into fibrin monomer by the action of thrombin. In the mouse, fibrinogen is a hexamer, 46 nm long and 9 nm maximal diameter, containing two sets of nonidentical chains (alpha, beta, and gamma) linked together by disulfide bonds.
    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:0016529    sarcoplasmic reticulum    A fine reticular network of membrane-limited elements that pervades the sarcoplasm of a muscle cell; continuous over large portions of the cell and with the nuclear envelope; that part of the endoplasmic reticulum specialized for calcium release, uptake and storage.
    GO:0030141    secretory granule    A small subcellular vesicle, surrounded by a membrane, that is formed from the Golgi apparatus and contains a highly concentrated protein destined for secretion. Secretory granules move towards the periphery of the cell and upon stimulation, their membranes fuse with the cell membrane, and their protein load is exteriorized. Processing of the contained protein may take place in secretory granules.

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  TSP1_HUMAN | P07996
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 Related Entries

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        TSP1_HUMAN | P079961lsl 1ux6 1z78 1za4 2es3 2ouh 2ouj 3r6b 5foe

(-) Related Entries Specified in the PDB File

1z78 CRYSTAL STRUCTURE OF THE THROMBOSPONDIN-1 N-TERMINAL DOMAIN
1za4 CRYSTAL STRUCTURE OF THE THROMBOSPONDIN-1 N-TERMINAL DOMAIN IN COMPLEX WITH ARIXTRA