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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stepanyuk G.A., Liu Z.J., Burakova L.P., Lee J..., Rose J..., Vysotski E.S., Wang B.C.
Заглавие : Spatial structure of the novel light-sensitive photoprotein berovin from the ctenophore Beroe abyssicola in the Ca2+-loaded apoprotein conformation state
Колич.характеристики :8 с
Коллективы : RFBR [09-04-00172, 12-04-00131, 12-04-91153]; NSFC [31270795, 31021062]; Government of Russian Federation of the RAS [11.G34.31.0058]; National Institutes of Health [GM62407]; Georgia Research Alliance; University of Georgia Research Foundation; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [W-31-109-Eng-38]
Место публикации : BBA-Proteins Proteomics: ELSEVIER SCIENCE BV, 2013. - Vol. 1834, Is. 10. - С. 2139-2146. - ISSN 1570-9639, DOI 10.1016/j.bbapap.2013.07.006
Примечания : Cited References: 64. - This work was supported by RFBR grants 09-04-00172, 12-04-00131, 12-04-91153, and NSFC 31270795 and 31021062, by the Programs of the Government of Russian Federation "Measures to Attract Leading Scientists to Russian Educational Institutions" (grant 11.G34.31.0058) "Molecular and Cellular Biology" of the RAS. It was also supported in part with funds from the National Institutes of Health (GM62407), The Georgia Research Alliance and the University of Georgia Research Foundation. Data were collected at Southeast Regional Collaborative Access Team (SER-CAT) 22-ID beamline at the Advanced Photon Source, Argonne National Laboratory. Supporting institutions may be found at www.ser-cat.org/members.html. The use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. W-31-109-Eng-38.
Предметные рубрики: CALCIUM-ACTIVATED PHOTOPROTEINS
COELENTERAZINE-BINDING PROTEIN
CRYSTAL-STRUCTURE
MNEMIOPSIS-SP
CA2+-REGULATED PHOTOPROTEINS
OBELIN BIOLUMINESCENCE
ANGSTROM RESOLUTION
RECOMBINANT OBELIN
RENILLA-RENIFORMIS
APO-OBELIN
Ключевые слова (''Своб.индексиров.''): coelenterazine--calcium--bioluminescence--luciferase
Аннотация: The bright bioluminescence of ctenophores, found in oceans worldwide, is determined by Ca2+-regulated photoproteins, functionally identical to and sharing many properties of hydromedusan photoproteins. In contrast, however, the ctenophore photoproteins are extremely sensitive to UV and visible light over the range of their absorption spectrum. The spatial structure of a novel light-sensitive photoprotein from the ctenophore Beroe abyssicola in its apoform bound with three calcium ions is determined at 2.0 angstrom. We demonstrate that the apoberovin is a slightly asymmetrical compact globular protein formed by two domains with a cavity in the center, which exactly retains the fold architecture characteristic of hydromedusan photoproteins despite their low amino acid sequence identity. However, the structural alignment of these two photoprotein classes clearly shows that despite the high similarity of shape and geometry of their coelenterazine-binding cavities, their interiors differ drastically. The key residues appearing to be crucial for stabilizing the 2-hydroperoxycoelenterazine and for formation of the emitter in hydromedusan photoproteins, are replaced in berovin by amino acid residues having completely different side chain properties. Evidently, these replacements must be responsible for the distinct properties of ctenophore photoproteins such as sensitivity to light or the fact that the formation of active photoprotein from apophotoprotein, coelenterazine, and oxygen is more effective at alkaline pH. (C) 2013 Elsevier B.V. All rights reserved.
WOS
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stepanyuk G.A., Xu H..., Wu C.K., Markova S.V., Lee J..., Vysotski E.S., Wang B.C.
Заглавие : Expression, purification and characterization of the secreted luciferase of the copepod Metridia longa from Sf9 insect cells
Колич.характеристики :7 с
Коллективы :
Место публикации : Protein Expr. Purif.: ACADEMIC PRESS INC ELSEVIER SCIENCE, 2008. - Vol. 61, Is. 2. - С. 142-148. - ISSN 1046-5928, DOI 10.1016/j.pep.2008.05.013
Примечания : Cited References: 34. - This work was supported by the National Institutes of Health (Grant 1P50 GM62407), University of Georgia Research Foundation and Georgia Research Alliance, the Russian Foundation for Basic Research and Taiwan National Science Council (Grant 06-0489502) and the program for "Molecular and Cellular Biology" of Russian Academy of Sciences.
Предметные рубрики: VARGULA-HILGENDORFII LUCIFERASE
CRYSTAL-STRUCTURE
RENILLA-RENIFORMIS
GAUSSIA LUCIFERASE
BIOLUMINESCENT REPORTER
OBELIN BIOLUMINESCENCE
ANGSTROM RESOLUTION
MAMMALIAN-CELLS
GENE-EXPRESSION
IN-VIVO
Аннотация: Metridia luciferase is a secreted luciferase from a marine copepod and uses coelenterazine as a substrate to produce a blue bioluminescence This luciferase has been successfully applied as a bioluminescent reporter in mammalian cells. The main advantage of secreted luciferase as a reporter is the capability of measuring intracellular events without destroying the cells or tissues and this property is well suited for development of high throughput screening technologies. However because Metridia luciferase is a Cys-rich protein, Escherichia coli expression systems produce an incorrectly folded protein, hindering its biochemical characterization and application for development of in vitro bioluminescent assays. Here we report the successful expression of Metridia luciferase with its signal peptide for secretion, in insect (Sf9) cells using the baculovirus expression system. Functionally active luciferase secreted by insect cells into the culture media has been efficiently purified with a yield of high purity protein of 2-3mg/L This Metridia luciferase expressed in the insect cell system is a monomeric protein showing 3.5-fold greater bioluminescence activity than luciferase expressed and purified from E. coli. The near coincidence of the experimental mass of Metridia luciferase purified from insect cells with that calculated from amino acid sequence. indicates that luciferase does not undergo post-translational modifications such as phosphorylation or glycosylation and also, the cleavage site of the signal peptide for secretion is at VQA-KS, as predicted from sequence analysis. (c) 2008 Elsevier Inc. All rights reserved.
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