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(-) Description

Title :  THE STRUCTURE OF HUMAN TRANSKETOLASE
 
Authors :  C. Parthier, K. Tittmann
Date :  23 Apr 10  (Deposition) - 28 Jul 10  (Release) - 20 Oct 10  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.75
Chains :  Asym. Unit :  A
Biol. Unit 1:  A  (2x)
Keywords :  Thiamin Diphosphate Tpp Thdp Enzyme Catalysis Sugar Metabolism, Transferase (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  L. Mitschke, C. Parthier, K. Schroder-Tittmann, J. Coy, S. Ludtke, K. Tittmann
The Crystal Structure Of Human Transketolase And New Insights Into Its Mode Of Action.
J. Biol. Chem. V. 285 31559 2010
PubMed-ID: 20667822  |  Reference-DOI: 10.1074/JBC.M110.149955

(-) Compounds

Molecule 1 - TRANSKETOLASE
    ChainsA
    EC Number2.2.1.1
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System Taxid562
    GeneTKT
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymTK

 Structural Features

(-) Chains, Units

  1
Asymmetric Unit A
Biological Unit 1 (2x)A

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (4, 13)

Asymmetric Unit (4, 13)
No.NameCountTypeFull Name
1CA1Ligand/IonCALCIUM ION
2EDO10Ligand/Ion1,2-ETHANEDIOL
3NA1Ligand/IonSODIUM ION
4TPP1Ligand/IonTHIAMINE DIPHOSPHATE
Biological Unit 1 (2, 22)
No.NameCountTypeFull Name
1CA-1Ligand/IonCALCIUM ION
2EDO20Ligand/Ion1,2-ETHANEDIOL
3NA-1Ligand/IonSODIUM ION
4TPP2Ligand/IonTHIAMINE DIPHOSPHATE

(-) Sites  (13, 13)

Asymmetric Unit (13, 13)
No.NameEvidenceResiduesDescription
01AC1SOFTWARECA A:1 , SER A:40 , LYS A:75 , HIS A:77 , GLY A:123 , SER A:124 , LEU A:125 , GLY A:154 , ASP A:155 , GLY A:156 , GLU A:157 , GLU A:160 , ASN A:185 , LEU A:187 , GLY A:188 , GLN A:189 , LYS A:244 , HIS A:258 , ASP A:341 , ILE A:364 , GLU A:366 , PHE A:392 , ARG A:395 , GLN A:428 , HOH A:629BINDING SITE FOR RESIDUE TPP A 700
02AC2SOFTWAREASP A:155 , ASN A:185 , LEU A:187 , HOH A:629 , TPP A:700BINDING SITE FOR RESIDUE CA A 1
03AC3SOFTWAREGLN A:127 , SER A:371 , VAL A:374 , GLN A:399 , MET A:402 , ALA A:403 , HOH A:933BINDING SITE FOR RESIDUE EDO A 619
04AC4SOFTWAREPRO A:441 , LYS A:538 , TYR A:563 , TYR A:564 , GLU A:565 , VAL A:589 , ASN A:590 , HOH A:792 , HOH A:981BINDING SITE FOR RESIDUE EDO A 2
05AC5SOFTWARELEU A:158 , SER A:159 , TRP A:164 , GLU A:165 , ALA A:168 , PHE A:209 , EDO A:624BINDING SITE FOR RESIDUE EDO A 620
06AC6SOFTWAREGLN A:189 , SER A:256 , TRP A:257 , HIS A:258 , ASN A:344 , HOH A:688 , HOH A:924BINDING SITE FOR RESIDUE EDO A 621
07AC7SOFTWARETYR A:564 , ALA A:588 , ASN A:590 , HOH A:678 , HOH A:761 , HOH A:766 , HOH A:968BINDING SITE FOR RESIDUE EDO A 622
08AC8SOFTWAREARG A:21 , ALA A:84 , GLU A:88 , GLU A:94 , LEU A:97BINDING SITE FOR RESIDUE EDO A 623
09AC9SOFTWARELEU A:158 , TRP A:164 , ARG A:205 , PHE A:209 , EDO A:620 , HOH A:644BINDING SITE FOR RESIDUE EDO A 624
10BC1SOFTWAREPRO A:63 , ASN A:68 , ASP A:69 , ARG A:70 , PHE A:71 , ARG A:379 , HOH A:835BINDING SITE FOR RESIDUE EDO A 625
11BC2SOFTWAREALA A:14 , ASN A:590 , ARG A:591 , HOH A:1029BINDING SITE FOR RESIDUE EDO A 626
12BC3SOFTWAREPHE A:71 , VAL A:72 , LEU A:73 , LEU A:82 , PHE A:117 , HOH A:666 , HOH A:670 , HOH A:717BINDING SITE FOR RESIDUE EDO A 627
13BC4SOFTWAREASN A:411 , ALA A:461 , THR A:464 , CYS A:468 , HOH A:657 , HOH A:691BINDING SITE FOR RESIDUE NA A 628

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 3MOS)

(-) Cis Peptide Bonds  (1, 1)

Asymmetric Unit
No.Residues
1Lys A:538 -Pro A:539

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (2, 2)

Asymmetric Unit (2, 2)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_052634I181VTKT_HUMANPolymorphism17052920AI181V
2UniProtVAR_077030R318CTKT_HUMANDisease (SDDHD)782092363AR318C

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)
Biological Unit 1 (2, 4)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_052634I181VTKT_HUMANPolymorphism17052920AI181V
2UniProtVAR_077030R318CTKT_HUMANDisease (SDDHD)782092363AR318C

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

(-) PROSITE Motifs  (2, 2)

Asymmetric Unit (2, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1TRANSKETOLASE_1PS00801 Transketolase signature 1.TKT_HUMAN23-43  1A:23-43
2TRANSKETOLASE_2PS00802 Transketolase signature 2.TKT_HUMAN422-438  1A:422-438
Biological Unit 1 (2, 4)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1TRANSKETOLASE_1PS00801 Transketolase signature 1.TKT_HUMAN23-43  2A:23-43
2TRANSKETOLASE_2PS00802 Transketolase signature 2.TKT_HUMAN422-438  2A:422-438

(-) Exons   (0, 0)

(no "Exon" information available for 3MOS)

(-) 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:616
 aligned with TKT_HUMAN | P29401 from UniProtKB/Swiss-Prot  Length:623

    Alignment length:616
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372       382       392       402       412       422       432       442       452       462       472       482       492       502       512       522       532       542       552       562       572       582       592       602       612      
            TKT_HUMAN     3 SYHKPDQQKLQALKDTANRLRISSIQATTAAGSGHPTSCCSAAEIMAVLFFHTMRYKSQDPRNPHNDRFVLSKGHAAPILYAVWAEAGFLAEAELLNLRKISSDLDGHPVPKQAFTDVATGSLGQGLGAACGMAYTGKYFDKASYRVYCLLGDGELSEGSVWEAMAFASIYKLDNLVAILDINRLGQSDPAPLQHQMDIYQKRCEAFGWHAIIVDGHSVEELCKAFGQAKHQPTAIIAKTFKGRGITGVEDKESWHGKPLPKNMAEQIIQEIYSQIQSKKKILATPPQEDAPSVDIANIRMPSLPSYKVGDKIATRKAYGQALAKLGHASDRIIALDGDTKNSTFSEIFKKEHPDRFIECYIAEQNMVSIAVGCATRNRTVPFCSTFAAFFTRAFDQIRMAAISESNINLCGSHCGVSIGEDGPSQMALEDLAMFRSVPTSTVFYPSDGVATEKAVELAANTKGICFIRTSRPENAIIYNNNEDFQVGQAKVVLKSKDDQVTVIGAGVTLHEALAAAELLKKEKINIRVLDPFTIKPLDRKLILDSARATKGRILTVEDHYYEGGIGEAVSSAVVGEPGITVTHLAVNRVPRSGKPAELLKMFGIDRDAIAQAVRG 618
               SCOP domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains -----------Transketolase_N-3mosA02 A:14-304                                                                                                                                                                                                                                                                   --------Transket_pyr-3mosA01 A:313-478                                                                                                                                        -----------Transketolase_C-3mosA03 A:490-612                                                                                          ------ Pfam domains
         Sec.struct. author .....hhhhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhh...............eeee.hhhhhhhhhhhhhhh...hhhhhhhh..........................hhhhhhhhhhhhhhhh......eeeeee.hhhhhhhhhhhhhhhhhh....eeeeeee.............hhhhhhhhhhhh..eeeeee..hhhhhhhhhhh.....eeeeee.....................hhhhhhhhhhhhhhh......................................hhhhhhhhhhhhhhhhh..eeeee..hhhhhhhhhhhhhh...eee...hhhhhhhhhhhhhhhhh.eeeeeee.hhhhhhhhhhhhhhhh...eeeeee..hhhhh..hhhhh..hhhhhhhh...eeee...hhhhhhhhhhhhhh...eeeee.....................eeee....eeeeee..hhhhhhhhhhhhhhhh...eeeeee..eee..hhhhhhhhhhhh..eeeeeeeee...hhhhhhhhhhh.....eeeeeee.......hhhhhhhhh..hhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------V----------------------------------------------------------------------------------------------------------------------------------------C------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE --------------------TRANSKETOLASE_1      ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------TRANSKETOLASE_2  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3mos A   3 SYHKPDQQKLQALKDTANRLRISSIQATTAAGSGHPTSCCSAAEIMAVLFFHTMRYKSQDPRNPHNDRFVLSKGHAAPILYAVWAEAGFLAEAELLNLRKISSDLDGHPVPKQAFTDVATGSLGQGLGAACGMAYTGKYFDKASYRVYCLLGDGELSEGSVWEAMAFASIYKLDNLVAILDINRLGQSDPAPLQHQMDIYQKRCEAFGWHAIIVDGHSVEELCKAFGQAKHQPTAIIAKTFKGRGITGVEDKESWHGKPLPKNMAEQIIQEIYSQIQSKKKILATPPQEDAPSVDIANIRMPSLPSYKVGDKIATRKAYGQALAKLGHASDRIIALDGDTKNSTFSEIFKKEHPDRFIECYIAEQNMVSIAVGCATRNRTVPFCSTFAAFFTRAFDQIRMAAISESNINLCGSHCGVSIGEDGPSQMALEDLAMFRSVPTSTVFYPSDGVATEKAVELAANTKGICFIRTSRPENAIIYNNNEDFQVGQAKVVLKSKDDQVTVIGAGVTLHEALAAAELLKKEKINIRVLDPFTIKPLDRKLILDSARATKGRILTVEDHYYEGGIGEAVSSAVVGEPGITVTHLAVNRVPRSGKPAELLKMFGIDRDAIAQAVRG 618
                                    12        22        32        42        52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372       382       392       402       412       422       432       442       452       462       472       482       492       502       512       522       532       542       552       562       572       582       592       602       612      

   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  (0, 0)

(no "SCOP Domain" information available for 3MOS)

(-) CATH Domains  (0, 0)

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

(-) Pfam Domains  (3, 3)

Asymmetric Unit

(-) Gene Ontology  (20, 20)

Asymmetric Unit(hide GO term definitions)
Chain A   (TKT_HUMAN | P29401)
molecular function
    GO:0003824    catalytic activity    Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
    GO:0048037    cofactor binding    Interacting selectively and non-covalently with a cofactor, a substance that is required for the activity of an enzyme or other protein. Cofactors may be inorganic, such as the metal atoms zinc, iron, and copper in certain forms, or organic, in which case they are referred to as coenzymes. Cofactors may either be bound tightly to active sites or bind loosely with the substrate.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    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.
    GO:0016740    transferase activity    Catalysis of the transfer of a group, e.g. a methyl group, glycosyl group, acyl group, phosphorus-containing, or other groups, from one compound (generally regarded as the donor) to another compound (generally regarded as the acceptor). Transferase is the systematic name for any enzyme of EC class 2.
    GO:0004802    transketolase activity    Catalysis of the reversible transfer of a 2-carbon ketol group (CH2OH-CO-) from a ketose phosphate donor to an aldose phosphate acceptor.
biological process
    GO:0046166    glyceraldehyde-3-phosphate biosynthetic process    The chemical reactions and pathways resulting in the formation of glyceraldehyde-3-phosphate, an important intermediate in glycolysis.
    GO:0008152    metabolic process    The chemical reactions and pathways, including anabolism and catabolism, by which living organisms transform chemical substances. Metabolic processes typically transform small molecules, but also include macromolecular processes such as DNA repair and replication, and protein synthesis and degradation.
    GO:0006098    pentose-phosphate shunt    The glucose-6-phosphate catabolic process in which, coupled to NADPH synthesis, glucose-6-P is oxidized with the formation of carbon dioxide (CO2) and ribulose 5-phosphate; ribulose 5-P then enters a series of reactions interconverting sugar phosphates. The pentose phosphate pathway is a major source of reducing equivalents for biosynthesis reactions and is also important for the conversion of hexoses to pentoses.
    GO:0009052    pentose-phosphate shunt, non-oxidative branch    The branch of the pentose-phosphate shunt which does not involve oxidation reactions. It comprises a series of sugar phosphate interconversions, starting with ribulose 5-P and producing fructose 6-P and glyceraldehyde 3-P.
    GO:0040008    regulation of growth    Any process that modulates the frequency, rate or extent of the growth of all or part of an organism so that it occurs at its proper speed, either globally or in a specific part of the organism's development.
    GO:0005999    xylulose biosynthetic process    The chemical reactions and pathways resulting in the formation of xylulose, the ketopentose threo-2-pentulose.
cellular component
    GO:0005829    cytosol    The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
    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:0043209    myelin sheath    An electrically insulating fatty layer that surrounds the axons of many neurons. It is an outgrowth of glial cells: Schwann cells supply the myelin for peripheral neurons while oligodendrocytes supply it to those of the central nervous system.
    GO:0005654    nucleoplasm    That part of the nuclear content other than the chromosomes or the nucleolus.
    GO:0005634    nucleus    A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
    GO:0005777    peroxisome    A small organelle enclosed by a single membrane, and found in most eukaryotic cells. Contains peroxidases and other enzymes involved in a variety of metabolic processes including free radical detoxification, lipid catabolism and biosynthesis, and hydrogen peroxide metabolism.
    GO:0031982    vesicle    Any small, fluid-filled, spherical organelle enclosed by membrane.

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 Related Entries

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

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        TKT_HUMAN | P294013ooy 4kxu 4kxv 4kxw 4kxx 4kxy

(-) Related Entries Specified in the PDB File

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