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Crystal Structure of ORF12 from Lactococcus lactis Phage p2 Identifies a Tape Measure Protein Chaperone

Identifieur interne : 000026 ( PascalFrancis/Curation ); précédent : 000025; suivant : 000027

Crystal Structure of ORF12 from Lactococcus lactis Phage p2 Identifies a Tape Measure Protein Chaperone

Auteurs : Marina Siponen [France] ; Giuliano Sciara [France] ; Manuela Villion [Canada] ; Silvia Spinelli [France] ; Julie Lichiere [France] ; Christian Cambillau [France] ; Sylvain Moineau [Canada] ; Valérie Campanacci [France]

Source :

RBID : Pascal:09-0106916

Descripteurs français

English descriptors

Abstract

We report here the characterization of the nonstructural protein ORF12 of the virulent lactococcal phage p2, which belongs to the Siphoviridae family. ORF12 was produced as a soluble protein, which forms large oligomers (6- to 15-mers) in solution. Using anti-ORF12 antibodies, we have confirmed that ORF12 is not found in the virion structure but is detected in the second half of the lytic cycle, indicating that it is a late-expressed protein. The structure of ORF12, solved by single anomalous diffraction and refined at 2.9-Å resolution, revealed a previously unknown fold as well as the presence of a hydrophobic patch at its surface. Furthermore, crystal packing of ORF12 formed long spirals in which a hydrophobic, continuous crevice was identified. This crevice exhibited a repeated motif of aromatic residues, which coincided with the same repeated motif usually found in tape measure protein (TMP), predicted to form helices. A model of a complex between ORF12 and a repeated motif of the TMP of phage p2 (ORF14) was generated, in which the TMP helix fitted exquisitely in the crevice and the aromatic patches of ORF12. We suggest, therefore, that ORF12 might act as a chaperone for TMP hydrophobic repeats, maintaining TMP in solution during the tail assembly of the lactococcal siphophage p2.
pA  
A01 01  1    @0 0021-9193
A02 01      @0 JOBAAY
A03   1    @0 J. bacteriol.
A05       @2 191
A06       @2 3
A08 01  1  ENG  @1 Crystal Structure of ORF12 from Lactococcus lactis Phage p2 Identifies a Tape Measure Protein Chaperone
A11 01  1    @1 SIPONEN (Marina)
A11 02  1    @1 SCIARA (Giuliano)
A11 03  1    @1 VILLION (Manuela)
A11 04  1    @1 SPINELLI (Silvia)
A11 05  1    @1 LICHIERE (Julie)
A11 06  1    @1 CAMBILLAU (Christian)
A11 07  1    @1 MOINEAU (Sylvain)
A11 08  1    @1 CAMPANACCI (Valérie)
A14 01      @1 Architecture et Fonction des Macromolécules Biologiques, UMR 6098 CNRS and Universités d'Aix-Marseille I & II, Campus de Luminy, case 932 @2 13288 Marseille @3 FRA @Z 1 aut. @Z 2 aut. @Z 4 aut. @Z 5 aut. @Z 6 aut. @Z 8 aut.
A14 02      @1 Groupe de Recherche en Écologie Buccale (GREB), Faculté de Médecine Dentaire, Université Laval @2 Québec City, Québec, G1K 7P4 @3 CAN @Z 3 aut. @Z 7 aut.
A14 03      @1 Département de Biochimie et de Microbiologie, Faculté des Sciences et de Génie, Université Laval @2 Québec City, Québec, G1K 7P4 @3 CAN @Z 3 aut. @Z 7 aut.
A14 04      @1 Félix d'Hérelle Reference Center for Bacterial Viruses, Université Laval @2 Québec City, Québec, G1K 7P4 @3 CAN @Z 7 aut.
A20       @1 728-734
A21       @1 2009
A23 01      @0 ENG
A43 01      @1 INIST @2 2041 @5 354000184199610080
A44       @0 0000 @1 © 2009 INIST-CNRS. All rights reserved.
A45       @0 47 ref.
A47 01  1    @0 09-0106916
A60       @1 P
A61       @0 A
A64 01  1    @0 Journal of bacteriology
A66 01      @0 USA
C01 01    ENG  @0 We report here the characterization of the nonstructural protein ORF12 of the virulent lactococcal phage p2, which belongs to the Siphoviridae family. ORF12 was produced as a soluble protein, which forms large oligomers (6- to 15-mers) in solution. Using anti-ORF12 antibodies, we have confirmed that ORF12 is not found in the virion structure but is detected in the second half of the lytic cycle, indicating that it is a late-expressed protein. The structure of ORF12, solved by single anomalous diffraction and refined at 2.9-Å resolution, revealed a previously unknown fold as well as the presence of a hydrophobic patch at its surface. Furthermore, crystal packing of ORF12 formed long spirals in which a hydrophobic, continuous crevice was identified. This crevice exhibited a repeated motif of aromatic residues, which coincided with the same repeated motif usually found in tape measure protein (TMP), predicted to form helices. A model of a complex between ORF12 and a repeated motif of the TMP of phage p2 (ORF14) was generated, in which the TMP helix fitted exquisitely in the crevice and the aromatic patches of ORF12. We suggest, therefore, that ORF12 might act as a chaperone for TMP hydrophobic repeats, maintaining TMP in solution during the tail assembly of the lactococcal siphophage p2.
C02 01  X    @0 002A05B15
C02 02  X    @0 002A05C10
C03 01  X  FRE  @0 Lactococcus lactis @2 NS @5 01
C03 01  X  ENG  @0 Lactococcus lactis @2 NS @5 01
C03 01  X  SPA  @0 Lactococcus lactis @2 NS @5 01
C03 02  X  FRE  @0 Bactériophage P2 @2 NW @5 02
C03 02  X  ENG  @0 Phage P2 @2 NW @5 02
C03 02  X  SPA  @0 Phage P2 @2 NW @5 02
C03 03  X  FRE  @0 Structure cristalline @5 05
C03 03  X  ENG  @0 Crystalline structure @5 05
C03 03  X  SPA  @0 Estructura cristalina @5 05
C03 04  X  FRE  @0 Identification @5 06
C03 04  X  ENG  @0 Identification @5 06
C03 04  X  SPA  @0 Identificación @5 06
C03 05  X  FRE  @0 Protéine @5 07
C03 05  X  ENG  @0 Protein @5 07
C03 05  X  SPA  @0 Proteína @5 07
C03 06  X  FRE  @0 Chaperon @5 08
C03 06  X  ENG  @0 Chaperone @5 08
C03 06  X  SPA  @0 Chaperone @5 08
C03 07  X  FRE  @0 Microbiologie @5 09
C03 07  X  ENG  @0 Microbiology @5 09
C03 07  X  SPA  @0 Microbiología @5 09
C07 01  X  FRE  @0 Streptococcaceae @2 NS
C07 01  X  ENG  @0 Streptococcaceae @2 NS
C07 01  X  SPA  @0 Streptococcaceae @2 NS
C07 02  X  FRE  @0 Micrococcales @2 NS
C07 02  X  ENG  @0 Micrococcales @2 NS
C07 02  X  SPA  @0 Micrococcales @2 NS
C07 03  X  FRE  @0 Bactérie
C07 03  X  ENG  @0 Bacteria
C07 03  X  SPA  @0 Bacteria
C07 04  X  FRE  @0 Bactériophage @2 NW
C07 04  X  ENG  @0 Phage @2 NW
C07 04  X  SPA  @0 Phage @2 NW
C07 05  X  FRE  @0 Virus @2 NW
C07 05  X  ENG  @0 Virus @2 NW
C07 05  X  SPA  @0 Virus @2 NW
C07 06  X  FRE  @0 Bactérie lactique @5 13
C07 06  X  ENG  @0 Lactic acid bacteria @5 13
C07 06  X  SPA  @0 Bacteria láctica @5 13
N21       @1 075
N44 01      @1 OTO
N82       @1 OTO

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<term>Lactococcus lactis</term>
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<div type="abstract" xml:lang="en">We report here the characterization of the nonstructural protein ORF12 of the virulent lactococcal phage p2, which belongs to the Siphoviridae family. ORF12 was produced as a soluble protein, which forms large oligomers (6- to 15-mers) in solution. Using anti-ORF12 antibodies, we have confirmed that ORF12 is not found in the virion structure but is detected in the second half of the lytic cycle, indicating that it is a late-expressed protein. The structure of ORF12, solved by single anomalous diffraction and refined at 2.9-Å resolution, revealed a previously unknown fold as well as the presence of a hydrophobic patch at its surface. Furthermore, crystal packing of ORF12 formed long spirals in which a hydrophobic, continuous crevice was identified. This crevice exhibited a repeated motif of aromatic residues, which coincided with the same repeated motif usually found in tape measure protein (TMP), predicted to form helices. A model of a complex between ORF12 and a repeated motif of the TMP of phage p2 (ORF14) was generated, in which the TMP helix fitted exquisitely in the crevice and the aromatic patches of ORF12. We suggest, therefore, that ORF12 might act as a chaperone for TMP hydrophobic repeats, maintaining TMP in solution during the tail assembly of the lactococcal siphophage p2.</div>
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<s0>JOBAAY</s0>
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<s1>Crystal Structure of ORF12 from Lactococcus lactis Phage p2 Identifies a Tape Measure Protein Chaperone</s1>
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<s1>Groupe de Recherche en Écologie Buccale (GREB), Faculté de Médecine Dentaire, Université Laval</s1>
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<s1>Félix d'Hérelle Reference Center for Bacterial Viruses, Université Laval</s1>
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<s0>We report here the characterization of the nonstructural protein ORF12 of the virulent lactococcal phage p2, which belongs to the Siphoviridae family. ORF12 was produced as a soluble protein, which forms large oligomers (6- to 15-mers) in solution. Using anti-ORF12 antibodies, we have confirmed that ORF12 is not found in the virion structure but is detected in the second half of the lytic cycle, indicating that it is a late-expressed protein. The structure of ORF12, solved by single anomalous diffraction and refined at 2.9-Å resolution, revealed a previously unknown fold as well as the presence of a hydrophobic patch at its surface. Furthermore, crystal packing of ORF12 formed long spirals in which a hydrophobic, continuous crevice was identified. This crevice exhibited a repeated motif of aromatic residues, which coincided with the same repeated motif usually found in tape measure protein (TMP), predicted to form helices. A model of a complex between ORF12 and a repeated motif of the TMP of phage p2 (ORF14) was generated, in which the TMP helix fitted exquisitely in the crevice and the aromatic patches of ORF12. We suggest, therefore, that ORF12 might act as a chaperone for TMP hydrophobic repeats, maintaining TMP in solution during the tail assembly of the lactococcal siphophage p2.</s0>
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