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Tammenkoski M, Koivula K, Cusanelli E, Zollo M, Steegborn C, Baykov AA, Lahti R. Human Metastasis Regulator Protein H-Prune is a Short-Chain Exopolyphosphatase. Biochemistry 2008; 47:9707-13. [DOI: 10.1021/bi8010847] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marko Tammenkoski
- Department of Biochemistry, University of Turku, FIN-20014 Turku, Finland, Department of Biochemistry and Biotechnological Medicine, Via Pansini 5, University Federico II of Naples, Italy, c/o CEINGE, Centro di Ingegneria Genetica e Biotecnologie Avanzate, Naples, Italy, Department of Physiological Chemistry, Ruhr-University Bochum, 44801 Bochum, Germany, and A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119899, Russia
| | - Katja Koivula
- Department of Biochemistry, University of Turku, FIN-20014 Turku, Finland, Department of Biochemistry and Biotechnological Medicine, Via Pansini 5, University Federico II of Naples, Italy, c/o CEINGE, Centro di Ingegneria Genetica e Biotecnologie Avanzate, Naples, Italy, Department of Physiological Chemistry, Ruhr-University Bochum, 44801 Bochum, Germany, and A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119899, Russia
| | - Emilio Cusanelli
- Department of Biochemistry, University of Turku, FIN-20014 Turku, Finland, Department of Biochemistry and Biotechnological Medicine, Via Pansini 5, University Federico II of Naples, Italy, c/o CEINGE, Centro di Ingegneria Genetica e Biotecnologie Avanzate, Naples, Italy, Department of Physiological Chemistry, Ruhr-University Bochum, 44801 Bochum, Germany, and A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119899, Russia
| | - Massimo Zollo
- Department of Biochemistry, University of Turku, FIN-20014 Turku, Finland, Department of Biochemistry and Biotechnological Medicine, Via Pansini 5, University Federico II of Naples, Italy, c/o CEINGE, Centro di Ingegneria Genetica e Biotecnologie Avanzate, Naples, Italy, Department of Physiological Chemistry, Ruhr-University Bochum, 44801 Bochum, Germany, and A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119899, Russia
| | - Clemens Steegborn
- Department of Biochemistry, University of Turku, FIN-20014 Turku, Finland, Department of Biochemistry and Biotechnological Medicine, Via Pansini 5, University Federico II of Naples, Italy, c/o CEINGE, Centro di Ingegneria Genetica e Biotecnologie Avanzate, Naples, Italy, Department of Physiological Chemistry, Ruhr-University Bochum, 44801 Bochum, Germany, and A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119899, Russia
| | - Alexander A. Baykov
- Department of Biochemistry, University of Turku, FIN-20014 Turku, Finland, Department of Biochemistry and Biotechnological Medicine, Via Pansini 5, University Federico II of Naples, Italy, c/o CEINGE, Centro di Ingegneria Genetica e Biotecnologie Avanzate, Naples, Italy, Department of Physiological Chemistry, Ruhr-University Bochum, 44801 Bochum, Germany, and A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119899, Russia
| | - Reijo Lahti
- Department of Biochemistry, University of Turku, FIN-20014 Turku, Finland, Department of Biochemistry and Biotechnological Medicine, Via Pansini 5, University Federico II of Naples, Italy, c/o CEINGE, Centro di Ingegneria Genetica e Biotecnologie Avanzate, Naples, Italy, Department of Physiological Chemistry, Ruhr-University Bochum, 44801 Bochum, Germany, and A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119899, Russia
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Ilias M, Young TW. Streptococcus gordonii soluble inorganic pyrophosphatase: An important role for the interdomain region in enzyme activity. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2006; 1764:1299-306. [PMID: 16829218 DOI: 10.1016/j.bbapap.2006.05.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2006] [Revised: 05/19/2006] [Accepted: 05/23/2006] [Indexed: 10/24/2022]
Abstract
Streptococcus gordonii DL1(Challis) soluble inorganic pyrophosphatase was shown to be a homo dimer with a subunit molecular mass of 33407. In solution, in the presence of Mn(2+), the protein is ellipsoidal with an axial ratio of 3.37 and molecular mass of 67000. In the absence of the divalent cation, the molecular mass is unchanged but the axial ratio increases to 3.94. The enzyme, in the presence of 5 mM Mg(2+), at 25 degrees Celsius and pH 9.0, has K(m) and k(cat) values of 62 microM and 6290 s(-1), respectively. The free N- and C-terminal domains of Streptococcus gordonii PPase did not interact productively when mixed together. Replacing the interdomain region with that from Bacillus subtilis decreased the catalytic efficiency of the enzyme whereas inserting the same region from the Archaeglobus fulgidus thermophilic enzyme yielded an inactive protein. Substitution, deletion and insertion of amino acid residues in the interdomain region were found to affect the monomer dimer equilibrium in the absence of Mn(2+) ions. In the presence of these ions however the variant proteins were dimers. Proteins with altered interdomain regions also displayed a 2- to 625-fold decrease in catalytic efficiency. These data together with that of computer analysis show that the interdomain region has characteristics of a mechanical hinge. Modelling mutant proteins onto the wild type shows that the active site regions are not significantly perturbed. These results show that, although distant from the active site, the interdomain region plays a role in enzyme activity and both its length and composition are important. This supports the hypothesis that catalytic activity requires the N- and C terminal domains of the enzyme to open and close using the interdomain region as a hinge.
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Affiliation(s)
- Mohammad Ilias
- Department of Microbiology, University of Dhaka, Dhaka 1000, Bangladesh
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Celis H, Franco B, Escobedo S, Romero I. Rhodobacter sphaeroides has a family II pyrophosphatase: comparison with other species of photosynthetic bacteria. Arch Microbiol 2003; 179:368-76. [PMID: 12669192 DOI: 10.1007/s00203-003-0539-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2002] [Revised: 12/16/2002] [Accepted: 01/13/2003] [Indexed: 10/20/2022]
Abstract
The cytoplasmic pyrophosphatase from Rhodobacter sphaeroides was purified and characterized. The enzyme is a homodimer of 64 kDa. The N-terminus was sequenced and used to obtain the complete pyrophosphatase sequence from the preliminary genome sequence of Rba. sphaeroides, showing extensive sequence similarity to family II or class C pyrophosphatases. The enzyme hydrolyzes only Mg-PP(i) and Mn-PP(i) with a K(m) of 0.35 mM for both substrates. It is not activated by free Mg (2+), in contrast to the cytoplasmic pyrophosphatase from Rhodospirillum rubrum, and it is not inhibited by NaF, methylendiphosphate, or imidodiphosphate. This work shows that Rba. sphaeroides and Rhodobacter capsulatus cytoplasmic pyrophosphatases belong to family II, in contrast to Rsp. rubrum, Rhodopseudomonas palustris, Rhodopseudomonas gelatinosa, and Rhodomicrobium vannielii cytoplasmic pyrophosphatases which should be classified as members of family I. This is the first report of family II cytoplasmic pyrophosphatases in photosynthetic bacteria and in a gram-negative organism.
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Affiliation(s)
- Heliodoro Celis
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Apartado Postal 70-243, 04510, D.F. México, México.
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