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(-) Description

Title :  PURINE NUCLEOSIDE PHOSPHORYLASE
 
Authors :  C. Mao, S. E. Ealick
Date :  13 Jul 95  (Deposition) - 20 Jun 96  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.00
Chains :  Asym./Biol. Unit :  A,B,C,D,E,F
Keywords :  Pentosyltransferase, Purine Nucleoside Phosphorylase, Glycosyltransferase (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  C. Mao, W. J. Cook, M. Zhou, G. W. Koszalka, T. A. Krenitsky, S. E. Ealick
The Crystal Structure Of Escherichia Coli Purine Nucleoside Phosphorylase: A Comparison With The Human Enzyme Reveals A Conserved Topology.
Structure V. 5 1373 1997
PubMed-ID: 9351810  |  Reference-DOI: 10.1016/S0969-2126(97)00287-6

(-) Compounds

Molecule 1 - PURINE NUCLEOSIDE PHOSPHORYLASE
    ChainsA, B, C, D, E, F
    EC Number2.4.2.1
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System GeneDEO OPERON
    Expression System PlasmidPBR322-DEO
    Expression System StrainBAU-1
    Expression System Taxid562
    Organism ScientificESCHERICHIA COLI
    Organism Taxid83333
    StrainK12

 Structural Features

(-) Chains, Units

  123456
Asymmetric/Biological Unit ABCDEF

Summary Information (see also Sequences/Alignments below)

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

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

(-) Sites  (2, 2)

Asymmetric Unit (2, 2)
No.NameEvidenceResiduesDescription
1S1UNKNOWNGLY A:20 , ARG A:24 , ARG A:43 , ARG A:87 , SER A:90PHOSPHATE BINDING SITE.
2S2UNKNOWNPHE A:159 , VAL A:178 , MET A:180 , ASP A:204 , ILE A:206BASE BINDING SITE.

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 6)

Asymmetric/Biological Unit (1, 6)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1PNP_UDP_1PS01232 Purine and other phosphorylases family 1 signature.DEOD_ECOLI62-77
 
 
 
 
 
  6A:61-76
B:61-76
C:61-76
D:61-76
E:61-76
F:61-76

(-) Exons   (0, 0)

(no "Exon" information available for 1ECP)

(-) 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:237
 aligned with DEOD_ECOLI | P0ABP8 from UniProtKB/Swiss-Prot  Length:239

    Alignment length:237
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       
           DEOD_ECOLI     2 ATPHINAEMGDFADVVLMPGDPLRAKYIAETFLEDAREVNNVRGMLGFTGTYKGRKISVMGHGMGIPSCSIYTKELITDFGVKKIIRVGSCGAVLPHVKLRDVVIGMGACTDSKVNRIRFKDHDFAAIADFDMVRNAVDAAKALGIDARVGNLFSADLFYSPDGEMFDVMEKYGILGVEMEAAGIYGVAAEFGAKALTICTVSDHIRTHEQTTAAERQTTFNDMIKIALESVLLGDK 238
               SCOP domains d1ecpa_ A: Purine nucleoside phosphorylase, PNP                                                                                                                                                                                               SCOP domains
               CATH domains 1ecpA00 A:1-237  [code=3.40.50.1580, no name defined]                                                                                                                                                                                         CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..............eeeee..hhhhhhhhhhh....eeee......eeeeee..eeeeee.....hhhhhhhhhhhhhhh...eeeeeeeeee.........eeeeeeeee...hhhhh...........hhhhhhhhhhhhhh...eeeeeeee.........hhhhhhhh....eee..hhhhhhhhhh...eeeeeeeeeee........hhhhhhhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------PNP_UDP_1       ----------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1ecp A   1 ATPHINAEMGDFADVVLMPGDPLRAKYIAETFLEDAREVNNVRGMLGFTGTYKGRKISVMGHGMGIPSCSIYTKELITDFGVKKIIRVGSCGAVLPHVKLRDVVIGMGACTDSKVNRIRFKDHDFAAIADFDMVRNAVDAAKALGIDARVGNLFSADLFYSPDGEMFDVMEKYGILGVEMEAAGIYGVAAEFGAKALTICTVSDHIRTHEQTTAAERQTTFNDMIKIALESVLLGDK 237
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       

Chain B from PDB  Type:PROTEIN  Length:237
 aligned with DEOD_ECOLI | P0ABP8 from UniProtKB/Swiss-Prot  Length:239

    Alignment length:237
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       
           DEOD_ECOLI     2 ATPHINAEMGDFADVVLMPGDPLRAKYIAETFLEDAREVNNVRGMLGFTGTYKGRKISVMGHGMGIPSCSIYTKELITDFGVKKIIRVGSCGAVLPHVKLRDVVIGMGACTDSKVNRIRFKDHDFAAIADFDMVRNAVDAAKALGIDARVGNLFSADLFYSPDGEMFDVMEKYGILGVEMEAAGIYGVAAEFGAKALTICTVSDHIRTHEQTTAAERQTTFNDMIKIALESVLLGDK 238
               SCOP domains d1ecpb_ B: Purine nucleoside phosphorylase, PNP                                                                                                                                                                                               SCOP domains
               CATH domains 1ecpB00 B:1-237  [code=3.40.50.1580, no name defined]                                                                                                                                                                                         CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..............eeeee..hhhhhhhhhhh....eeee......eeeeee..eeeeee.....hhhhhhhhhhhhh.....eeeeeeeeee.........eeeeeeeee...hhhhh...........hhhhhhhhhhhhh.....eeeeeee..........hhhhhhh....eee..hhhhhhhhhhh..eeeeeeeeeee........hhhhhhhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------PNP_UDP_1       ----------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1ecp B   1 ATPHINAEMGDFADVVLMPGDPLRAKYIAETFLEDAREVNNVRGMLGFTGTYKGRKISVMGHGMGIPSCSIYTKELITDFGVKKIIRVGSCGAVLPHVKLRDVVIGMGACTDSKVNRIRFKDHDFAAIADFDMVRNAVDAAKALGIDARVGNLFSADLFYSPDGEMFDVMEKYGILGVEMEAAGIYGVAAEFGAKALTICTVSDHIRTHEQTTAAERQTTFNDMIKIALESVLLGDK 237
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       

Chain C from PDB  Type:PROTEIN  Length:237
 aligned with DEOD_ECOLI | P0ABP8 from UniProtKB/Swiss-Prot  Length:239

    Alignment length:237
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       
           DEOD_ECOLI     2 ATPHINAEMGDFADVVLMPGDPLRAKYIAETFLEDAREVNNVRGMLGFTGTYKGRKISVMGHGMGIPSCSIYTKELITDFGVKKIIRVGSCGAVLPHVKLRDVVIGMGACTDSKVNRIRFKDHDFAAIADFDMVRNAVDAAKALGIDARVGNLFSADLFYSPDGEMFDVMEKYGILGVEMEAAGIYGVAAEFGAKALTICTVSDHIRTHEQTTAAERQTTFNDMIKIALESVLLGDK 238
               SCOP domains d1ecpc_ C: Purine nucleoside phosphorylase, PNP                                                                                                                                                                                               SCOP domains
               CATH domains 1ecpC00 C:1-237  [code=3.40.50.1580, no name defined]                                                                                                                                                                                         CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..............eeeee..hhhhhhhhhh.....eeee......eeeeee..eeeeee.....hhhhhhhhhhhhhhh...eeeeeeeeee.........eeeeeeeee...hhhhh...........hhhhhhhhhhhhhh...eeeeeeee........hhhhhhhhh....eee..hhhhhhhhhhh..eeeeeeeeeee........hhhhhhhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------PNP_UDP_1       ----------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1ecp C   1 ATPHINAEMGDFADVVLMPGDPLRAKYIAETFLEDAREVNNVRGMLGFTGTYKGRKISVMGHGMGIPSCSIYTKELITDFGVKKIIRVGSCGAVLPHVKLRDVVIGMGACTDSKVNRIRFKDHDFAAIADFDMVRNAVDAAKALGIDARVGNLFSADLFYSPDGEMFDVMEKYGILGVEMEAAGIYGVAAEFGAKALTICTVSDHIRTHEQTTAAERQTTFNDMIKIALESVLLGDK 237
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       

Chain D from PDB  Type:PROTEIN  Length:237
 aligned with DEOD_ECOLI | P0ABP8 from UniProtKB/Swiss-Prot  Length:239

    Alignment length:237
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       
           DEOD_ECOLI     2 ATPHINAEMGDFADVVLMPGDPLRAKYIAETFLEDAREVNNVRGMLGFTGTYKGRKISVMGHGMGIPSCSIYTKELITDFGVKKIIRVGSCGAVLPHVKLRDVVIGMGACTDSKVNRIRFKDHDFAAIADFDMVRNAVDAAKALGIDARVGNLFSADLFYSPDGEMFDVMEKYGILGVEMEAAGIYGVAAEFGAKALTICTVSDHIRTHEQTTAAERQTTFNDMIKIALESVLLGDK 238
               SCOP domains d1ecpd_ D: Purine nucleoside phosphorylase, PNP                                                                                                                                                                                               SCOP domains
               CATH domains 1ecpD00 D:1-237  [code=3.40.50.1580, no name defined]                                                                                                                                                                                         CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..............eeee...hhhhhhhh.......eeee......eeeeee..eeeeee.....hhhhhhhhhhhhhhh...eeeeeeeeee.........eeeeeeeee...hhhhh...........hhhhhhhhhhhhh.....eeeeeee........hhhhhhhhh....eee..hhhhhhhhhh...eeeeeeeeeee........hhhhhhhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------PNP_UDP_1       ----------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1ecp D   1 ATPHINAEMGDFADVVLMPGDPLRAKYIAETFLEDAREVNNVRGMLGFTGTYKGRKISVMGHGMGIPSCSIYTKELITDFGVKKIIRVGSCGAVLPHVKLRDVVIGMGACTDSKVNRIRFKDHDFAAIADFDMVRNAVDAAKALGIDARVGNLFSADLFYSPDGEMFDVMEKYGILGVEMEAAGIYGVAAEFGAKALTICTVSDHIRTHEQTTAAERQTTFNDMIKIALESVLLGDK 237
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       

Chain E from PDB  Type:PROTEIN  Length:237
 aligned with DEOD_ECOLI | P0ABP8 from UniProtKB/Swiss-Prot  Length:239

    Alignment length:237
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       
           DEOD_ECOLI     2 ATPHINAEMGDFADVVLMPGDPLRAKYIAETFLEDAREVNNVRGMLGFTGTYKGRKISVMGHGMGIPSCSIYTKELITDFGVKKIIRVGSCGAVLPHVKLRDVVIGMGACTDSKVNRIRFKDHDFAAIADFDMVRNAVDAAKALGIDARVGNLFSADLFYSPDGEMFDVMEKYGILGVEMEAAGIYGVAAEFGAKALTICTVSDHIRTHEQTTAAERQTTFNDMIKIALESVLLGDK 238
               SCOP domains d1ecpe_ E: Purine nucleoside phosphorylase, PNP                                                                                                                                                                                               SCOP domains
               CATH domains 1ecpE00 E:1-237  [code=3.40.50.1580, no name defined]                                                                                                                                                                                         CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..............eeee...hhhhhhhhhhh....eeee......eeeeee..eeeeee.....hhhhhhhhhhhhhh....eeeeeeeeee.........eeeeeeeee...hhhhh...........hhhhhhhhhhhhhh...eeeeeeee........hhhhhhhhh....eee..hhhhhhhhhhh..eeeeeeeeeee........hhhhhhhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------PNP_UDP_1       ----------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1ecp E   1 ATPHINAEMGDFADVVLMPGDPLRAKYIAETFLEDAREVNNVRGMLGFTGTYKGRKISVMGHGMGIPSCSIYTKELITDFGVKKIIRVGSCGAVLPHVKLRDVVIGMGACTDSKVNRIRFKDHDFAAIADFDMVRNAVDAAKALGIDARVGNLFSADLFYSPDGEMFDVMEKYGILGVEMEAAGIYGVAAEFGAKALTICTVSDHIRTHEQTTAAERQTTFNDMIKIALESVLLGDK 237
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       

Chain F from PDB  Type:PROTEIN  Length:237
 aligned with DEOD_ECOLI | P0ABP8 from UniProtKB/Swiss-Prot  Length:239

    Alignment length:237
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       
           DEOD_ECOLI     2 ATPHINAEMGDFADVVLMPGDPLRAKYIAETFLEDAREVNNVRGMLGFTGTYKGRKISVMGHGMGIPSCSIYTKELITDFGVKKIIRVGSCGAVLPHVKLRDVVIGMGACTDSKVNRIRFKDHDFAAIADFDMVRNAVDAAKALGIDARVGNLFSADLFYSPDGEMFDVMEKYGILGVEMEAAGIYGVAAEFGAKALTICTVSDHIRTHEQTTAAERQTTFNDMIKIALESVLLGDK 238
               SCOP domains d1ecpf_ F: Purine nucleoside phosphorylase, PNP                                                                                                                                                                                               SCOP domains
               CATH domains 1ecpF00 F:1-237  [code=3.40.50.1580, no name defined]                                                                                                                                                                                         CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..............eeee...hhhhhhhhhhh....eeee......eeeeee..eeeeee.....hhhhhhhhhhhhhh....eeeeeeeeee.........eeeeeeeee...hhhhh...........hhhhhhhhhhhhhh....eeeeeee.........hhhhhhhh....eee..hhhhhhhhhhh..eeeeeeeeeee........hhhhhhhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------PNP_UDP_1       ----------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1ecp F   1 ATPHINAEMGDFADVVLMPGDPLRAKYIAETFLEDAREVNNVRGMLGFTGTYKGRKISVMGHGMGIPSCSIYTKELITDFGVKKIIRVGSCGAVLPHVKLRDVVIGMGACTDSKVNRIRFKDHDFAAIADFDMVRNAVDAAKALGIDARVGNLFSADLFYSPDGEMFDVMEKYGILGVEMEAAGIYGVAAEFGAKALTICTVSDHIRTHEQTTAAERQTTFNDMIKIALESVLLGDK 237
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       

   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, 6)

Asymmetric/Biological Unit

(-) CATH Domains  (1, 6)

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

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1ECP)

(-) Gene Ontology  (14, 14)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A,B,C,D,E,F   (DEOD_ECOLI | P0ABP8)
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:0042802    identical protein binding    Interacting selectively and non-covalently with an identical protein or proteins.
    GO:0004731    purine-nucleoside phosphorylase activity    Catalysis of the reaction: purine nucleoside + phosphate = purine + alpha-D-ribose 1-phosphate.
    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:0016757    transferase activity, transferring glycosyl groups    Catalysis of the transfer of a glycosyl group from one compound (donor) to another (acceptor).
    GO:0016763    transferase activity, transferring pentosyl groups    Catalysis of the transfer of a pentosyl group from one compound (donor) to another (acceptor).
biological process
    GO:0006974    cellular response to DNA damage stimulus    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 stimulus indicating damage to its DNA from environmental insults or errors during metabolism.
    GO:0006139    nucleobase-containing compound metabolic process    Any cellular metabolic process involving nucleobases, nucleosides, nucleotides and nucleic acids.
    GO:0009116    nucleoside metabolic process    The chemical reactions and pathways involving a nucleoside, a nucleobase linked to either beta-D-ribofuranose (a ribonucleoside) or 2-deoxy-beta-D-ribofuranose, (a deoxyribonucleoside), e.g. adenosine, guanosine, inosine, cytidine, uridine and deoxyadenosine, deoxyguanosine, deoxycytidine and thymidine (= deoxythymidine).
    GO:0006152    purine nucleoside catabolic process    The chemical reactions and pathways resulting in the breakdown of purine nucleoside, one of a family of organic molecules consisting of a purine base covalently bonded to a sugar ribose (a ribonucleoside) or deoxyribose (a deoxyribonucleoside).
    GO:0019686    purine nucleoside interconversion    The chemical reactions and pathways by which a purine nucleoside is synthesized from another purine nucleoside.
    GO:0042278    purine nucleoside metabolic process    The chemical reactions and pathways involving one of a family of organic molecules consisting of a purine base covalently bonded to a sugar ribose (a ribonucleoside) or deoxyribose (a deoxyribonucleoside).
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:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.

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 Related Entries

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

UniProtKB/Swiss-Prot
        DEOD_ECOLI | P0ABP81a69 1k9s 1otx 1oty 1ou4 1oum 1ov6 1ovg 1pk7 1pk9 1pke 1pr0 1pr1 1pr2 1pr4 1pr5 1pr6 1pw7 3onv 3ooe 3ooh 3opv 3ut6 4ts3 4ts9 4tta 4tti 4ttj 5i3c 5iu6

(-) Related Entries Specified in the PDB File

(no "Related Entries Specified in the PDB File" available for 1ECP)