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(-) Description

Title :  TRANSKETOLASE FROM ESCHERICHIA COLI
 
Authors :  M. N. Isupov, J. A. Littlechild
Date :  23 Apr 99  (Deposition) - 17 Jun 03  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.90
Chains :  Asym./Biol. Unit :  A,B
Keywords :  Thiamine Pyrophosphate, D-Sedoheptulose 7-Phosphate D-Glyceraldehyde 3- Phosphate Glycolaldehyde Transferase, Transferase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  M. N. Isupov, M. P. Rupprecht, K. S. Wilson, Z. Dauter, J. A. Littlechil
Crystal Structure Of Escherichia Coli Transketolase
To Be Published
PubMed: search
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - PROTEIN (TRANSKETOLASE)
    Cellular Location: CYTOPLASM
    Chains: A, B
    EC Number: 2.2.1.1
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Taxid: 562
    Organism Scientific: ESCHERICHIA COLI
    Organism Taxid: 562

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit : AB

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (3, 6)

Asymmetric/Biological Unit (3, 6)
No.NameCountTypeFull Name
1CA2Ligand/IonCALCIUM ION
2SO42Ligand/IonSULFATE ION
3TPP2Ligand/IonTHIAMINE DIPHOSPHATE

(-) Sites  (8, 8)

Asymmetric Unit (8, 8)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREASP A:155 , ASN A:185 , ILE A:187 , TPP A:670 , HOH A:706BINDING SITE FOR RESIDUE CA A 675
2AC2SOFTWAREARG B:358 , SER B:385 , HIS B:461 , ARG B:520 , HOH B:954BINDING SITE FOR RESIDUE SO4 B 680
3AC3SOFTWAREASP B:155 , ASN B:185 , ILE B:187 , TPP B:670 , HOH B:712BINDING SITE FOR RESIDUE CA B 675
4AC4SOFTWAREARG A:358 , SER A:385 , HIS A:461 , ARG A:520 , HOH A:1174 , HOH A:1215BINDING SITE FOR RESIDUE SO4 A 680
5AC5SOFTWAREALA A:29 , HIS A:66 , GLY A:114 , LEU A:116 , ASP A:155 , GLY A:156 , GLU A:160 , ASN A:185 , ILE A:187 , ILE A:189 , ILE A:247 , HIS A:261 , CA A:675 , HOH A:706 , HOH A:754 , HOH A:767 , ASP B:381 , GLU B:411 , PHE B:437 , TYR B:440 , HOH B:1103BINDING SITE FOR RESIDUE TPP A 670
6AC6SOFTWAREASP A:381 , GLU A:411 , PHE A:437 , TYR A:440 , HOH A:1085 , ALA B:29 , HIS B:66 , GLY B:114 , LEU B:116 , ASP B:155 , GLY B:156 , GLU B:160 , ASN B:185 , ILE B:187 , ILE B:189 , ILE B:247 , HIS B:261 , CA B:675 , HOH B:712 , HOH B:800 , HOH B:876BINDING SITE FOR RESIDUE TPP B 670
7TPAAUTHORHIS A:66 , GLY A:114 , LEU A:116 , ASP A:155 , GLY A:156 , ASN A:185 , ILE A:187 , SER A:188 , ILE A:189 , HIS A:261 , ASP B:381 , GLU B:411 , PHE B:437 , TYR B:440COFACTOR BINDING
8TPBAUTHORHIS B:66 , GLY B:114 , LEU B:116 , ASP B:155 , GLY B:156 , ASN B:185 , ILE B:187 , SER B:188 , ILE B:189 , HIS B:261 , ASP A:381 , GLU A:411 , PHE A:437 , TYR A:440COFACTOR BINDING

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 1QGD)

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1QGD)

(-) PROSITE Motifs  (2, 4)

Asymmetric/Biological Unit (2, 4)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1TRANSKETOLASE_1PS00801 Transketolase signature 1.TKT1_ECOLI12-32
 		  2A:12-32
B:12-32
2TRANSKETOLASE_2PS00802 Transketolase signature 2.TKT1_ECOLI467-483
 		  2A:467-483
B:467-483

(-) Exons   (0, 0)

(no "Exon" information available for 1QGD)

(-) 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:662
 aligned with TKT1_ECOLI | P27302 from UniProtKB/Swiss-Prot  Length:663

    Alignment length:662
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341       351       361       371       381       391       401       411       421       431       441       451       461       471       481       491       501       511       521       531       541       551       561       571       581       591       601       611       621       631       641       651       661  
           TKT1_ECOLI     2 SSRKELANAIRALSMDAVQKAKSGHPGAPMGMADIAEVLWRDFLKHNPQNPSWADRDRFVLSNGHGSMLIYSLLHLTGYDLPMEELKNFRQLHSKTPGHPEVGYTAGVETTTGPLGQGIANAVGMAIAEKTLAAQFNRPGHDIVDHYTYAFMGDGCMMEGISHEVCSLAGTLKLGKLIAFYDDNGISIDGHVEGWFTDDTAMRFEAYGWHVIRDIDGHDAASIKRAVEEARAVTDKPSLLMCKTIIGFGSPNKAGTHDSHGAPLGDAEIALTREQLGWKYAPFEIPSEIYAQWDAKEAGQAKESAWNEKFAAYAKAYPQEAAEFTRRMKGEMPSDFDAKAKEFIAKLQANPAKIASRKASQNAIEAFGPLLPEFLGGSADLAPSNLTLWSGSKAINEDAAGNYIHYGVREFGMTAIANGISLHGGFLPYTSTFLMFVEYARNAVRMAALMKQRQVMVYTHDSIGLGEDGPTHQPVEQVASLRVTPNMSTWRPCDQVESAVAWKYGVERQDGPTALILSRQNLAQQERTEEQLANIARGGYVLKDCAGQPELIFIATGSEVELAVAAYEKLTAEGVKARVVSMPSTDAFDKQDAAYRESVLPKAVTARVAVEAGIADYWYKYVGLNGAIVGMTTFGESAPAELLFEEFGFTVDNVVAKAKELL 663
               SCOP domains d1qgda2 A:2-332 Transketolase (TK), PP module                                                                                                                                                                                                                                                                                              d1qgda1 A:333-527 Transketolase (TK), Pyr module                                                                                                                                                   d1qgda3 A:528-663 Transketolase (TK), C-domain                                                                                           SCOP domains
               CATH domains 1qgdA01 A:2-326  [code=3.40.50.970, no name defined]                                                                                                                                                                                                                                                                                 1qgdA02 A:327-537  [code=3.40.50.970, no name defined]                                                                                                                                                             1qgdA03 A:538-663  [code=3.40.50.920, no name defined]                                                                         CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..hhhhhhhhhhhhhhhhhhh.....hhhhhhhhhhhhhhhh...............eeee..hhhhhhhhhhhhhh.....hhhhhh............................hhhhhhhhhhhhhhhhhhhh...........eeeee.hhhhh.hhhhhhhhhhhh.....eeeeeee........hhh.....hhhhhhhh..eee.......hhhhhhhhhhhhh.....eeeeee.............hhh......hhhhhhhhhhh..........hhhhhhh..hhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhh......hhhhhhhhhhhhhh......hhhhhhhhhhhhhhh.....eee...hhhh.................eee....hhhhhhhhhhhhhh....eeeeeehhhhh..hhhhhhhhh....eeeeee...hhh...........hhhhhh.....eee....hhhhhhhhhhhhh.....eeeee...........hhhhhhhhh..eeee.......eeeee.hhhhhhhhhhhhhhhh....eeeee...hhhhhh..hhhhhhh.......eeee....hhhhhhhh....eee..........hhhhhhh....hhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------TRANSKETOLASE_1      --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------TRANSKETOLASE_2  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1qgd A   2 SSRKELANAIRALSMDAVQKAKSGHPGAPMGMADIAEVLWRDFLKHNPQNPSWADRDRFVLSNGHGSMLIYSLLHLTGYDLPMEELKNFRQLHSKTPGHPEVGKTAGVETTTGPLGQGIANAVGMAIAEKTLAAQFNRPGHDIVDHYTYAFMGDGCMMEGISHEVCSLAGTLKLGKLIAFYDDNGISIDGHVEGWFTDDTAMRFEAYGWHVIRDIDGHDAASIKRAVEEARAVTDKPSLLMCKTIIGFGSPNKAGTHDSHGAPLGDAEIALTREQLGWKYAPFEIPSEIYAQWDAKEAGQAKESAWNEKFAAYAKAYPQEAAEFTRRMKGEMPSDFDAKAKEFIAKLQANPAKIASRKASQNAIEAFGPLLPEFLGGSADLAPSNLTLWSGSKAINEDAAGNYIHYGVREFGMTAIANGISLHGGFLPYTSTFLMFVEYARNAVRMAALMKQRQVMVYTHDSIGLGEDGPTHQPVEQVASLRVTPNMSTWRPCDQVESAVAWKYGVERQDGPTALILSRQNLAQQERTEEQLANIARGGYVLKDCAGQPELIFIATGSEVELAVAAYEKLTAEGVKARVVSMPSTDAFDKQDAAYRESVLPKAVTARVAVEAGIADYWYKYVGLNGAIVGMTTFGESAPAELLFEEFGFTVDNVVAKAKELL 663
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341       351       361       371       381       391       401       411       421       431       441       451       461       471       481       491       501       511       521       531       541       551       561       571       581       591       601       611       621       631       641       651       661  


Chain B from PDB  Type:PROTEIN  Length:662
 aligned with TKT1_ECOLI | P27302 from UniProtKB/Swiss-Prot  Length:663

    Alignment length:662
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341       351       361       371       381       391       401       411       421       431       441       451       461       471       481       491       501       511       521       531       541       551       561       571       581       591       601       611       621       631       641       651       661  
           TKT1_ECOLI     2 SSRKELANAIRALSMDAVQKAKSGHPGAPMGMADIAEVLWRDFLKHNPQNPSWADRDRFVLSNGHGSMLIYSLLHLTGYDLPMEELKNFRQLHSKTPGHPEVGYTAGVETTTGPLGQGIANAVGMAIAEKTLAAQFNRPGHDIVDHYTYAFMGDGCMMEGISHEVCSLAGTLKLGKLIAFYDDNGISIDGHVEGWFTDDTAMRFEAYGWHVIRDIDGHDAASIKRAVEEARAVTDKPSLLMCKTIIGFGSPNKAGTHDSHGAPLGDAEIALTREQLGWKYAPFEIPSEIYAQWDAKEAGQAKESAWNEKFAAYAKAYPQEAAEFTRRMKGEMPSDFDAKAKEFIAKLQANPAKIASRKASQNAIEAFGPLLPEFLGGSADLAPSNLTLWSGSKAINEDAAGNYIHYGVREFGMTAIANGISLHGGFLPYTSTFLMFVEYARNAVRMAALMKQRQVMVYTHDSIGLGEDGPTHQPVEQVASLRVTPNMSTWRPCDQVESAVAWKYGVERQDGPTALILSRQNLAQQERTEEQLANIARGGYVLKDCAGQPELIFIATGSEVELAVAAYEKLTAEGVKARVVSMPSTDAFDKQDAAYRESVLPKAVTARVAVEAGIADYWYKYVGLNGAIVGMTTFGESAPAELLFEEFGFTVDNVVAKAKELL 663
               SCOP domains d1qgdb2 B:2-332 Transketolase (TK), PP module                                                                                                                                                                                                                                                                                              d1qgdb1 B:333-527 Transketolase (TK), Pyr module                                                                                                                                                   d1qgdb3 B:528-663 Transketolase (TK), C-domain                                                                                           SCOP domains
               CATH domains 1qgdB01 B:2-326  [code=3.40.50.970, no name defined]                                                                                                                                                                                                                                                                                 1qgdB02 B:327-537  [code=3.40.50.970, no name defined]                                                                                                                                                             1qgdB03 B:538-663  [code=3.40.50.920, no name defined]                                                                         CATH domains
           Pfam domains (1) -Transketolase_N-1qgdB03 B:3-334                                                                                                                                                                                                                                                                                                             ------------------Transket_pyr-1qgdB01 B:353-526                                                                                                                                                -------------Transketolase_C-1qgdB05 B:540-655                                                                                   -------- Pfam domains (1)
           Pfam domains (2) -Transketolase_N-1qgdB04 B:3-334                                                                                                                                                                                                                                                                                                             ------------------Transket_pyr-1qgdB02 B:353-526                                                                                                                                                -------------Transketolase_C-1qgdB06 B:540-655                                                                                   -------- Pfam domains (2)
         Sec.struct. author ..hhhhhhhhhhhhhhhhhhh.....hhhhhhhhhhhhhhhh...............eeee..hhhhhhhhhhhhhh.....hhhhhh............................hhhhhhhhhhhhhhhhhhhh...........eeeee.hhhhh.hhhhhhhhhhhh.....eeeeeee........hhh.....hhhhhhh...eee.......hhhhhhhhhhhhh.....eeeeee.............hhh......hhhhhhhhhhh..........hhhhhhh..hhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhh......hhhhhhhhhhhhhh......hhhhhhhhhhhhh.....eeeee...hhhh.................eee....hhhhhhhhhhhhhh...eeeeeeehhhhh..hhhhhhhhh.....eeeee...hhh...........hhhhhh.....eee....hhhhhhhhhhhhh.....eeee............hhhhhhhhh..eeee.......eeeee.hhhhhhhhhhhhhhhh....eeeee...hhhhh...hhhhhhh.......eeee....hhhhhhhh....eee..........hhhhhhh....hhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------TRANSKETOLASE_1      --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------TRANSKETOLASE_2  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1qgd B   2 SSRKELANAIRALSMDAVQKAKSGHPGAPMGMADIAEVLWRDFLKHNPQNPSWADRDRFVLSNGHGSMLIYSLLHLTGYDLPMEELKNFRQLHSKTPGHPEVGKTAGVETTTGPLGQGIANAVGMAIAEKTLAAQFNRPGHDIVDHYTYAFMGDGCMMEGISHEVCSLAGTLKLGKLIAFYDDNGISIDGHVEGWFTDDTAMRFEAYGWHVIRDIDGHDAASIKRAVEEARAVTDKPSLLMCKTIIGFGSPNKAGTHDSHGAPLGDAEIALTREQLGWKYAPFEIPSEIYAQWDAKEAGQAKESAWNEKFAAYAKAYPQEAAEFTRRMKGEMPSDFDAKAKEFIAKLQANPAKIASRKASQNAIEAFGPLLPEFLGGSADLAPSNLTLWSGSKAINEDAAGNYIHYGVREFGMTAIANGISLHGGFLPYTSTFLMFVEYARNAVRMAALMKQRQVMVYTHDSIGLGEDGPTHQPVEQVASLRVTPNMSTWRPCDQVESAVAWKYGVERQDGPTALILSRQNLAQQERTEEQLANIARGGYVLKDCAGQPELIFIATGSEVELAVAAYEKLTAEGVKARVVSMPSTDAFDKQDAAYRESVLPKAVTARVAVEAGIADYWYKYVGLNGAIVGMTTFGESAPAELLFEEFGFTVDNVVAKAKELL 663
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341       351       361       371       381       391       401       411       421       431       441       451       461       471       481       491       501       511       521       531       541       551       561       571       581       591       601       611       621       631       641       651       661
   Legend:   → Mismatch (orange background)
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  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (3, 6)

Asymmetric/Biological Unit
(-)
Class: Alpha and beta proteins (a/b) (23833)

(-) CATH Domains  (2, 6)

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

(-) Pfam Domains  (3, 6)

Asymmetric/Biological Unit
(-)
Clan: THDP-binding (106)
(-)
Clan: no clan defined [family: Transketolase_C] (40)

(-) Gene Ontology  (9, 9)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A,B   (TKT1_ECOLI | P27302)
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:0030145    manganese ion binding    Interacting selectively and non-covalently with manganese (Mn) ions.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0030976    thiamine pyrophosphate binding    Interacting selectively and non-covalently with thiamine pyrophosphate, the diphosphoric ester of thiamine. Acts as a coenzyme of several (de)carboxylases, transketolases, and alpha-oxoacid dehydrogenases.
    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: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: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.
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.

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 Related Entries

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UniProtKB/Swiss-Prot
        TKT1_ECOLI | P27302: 2r5n 2r8o 2r8p 5hht

(-) Related Entries Specified in the PDB File

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