Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells

Abstract Beauveriolide III (BeauIII) inhibited sterol O-acyltransferases 1 and 2 (SOAT1 and SOAT2), which are endoplasmic reticulum (ER) membrane proteins, in an enzyme-based assay, and selectively inhibited SOAT1 in a cell-based assay using SOAT1-/SOAT2-CHO cells. This discrepancy in SOAT inhibitio...
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Gespeichert in:

Autor*in:	Taichi Ohshiro [verfasserIn] Keisuke Kobayashi [verfasserIn] Mio Ohba [verfasserIn] Daisuke Matsuda [verfasserIn] Lawrence L. Rudel [verfasserIn] Takashi Takahashi [verfasserIn] Takayuki Doi [verfasserIn] Hiroshi Tomoda [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2017

Übergeordnetes Werk:	In: Scientific Reports - Nature Portfolio, 2011, 7(2017), 1, Seite 9
Übergeordnetes Werk:	volume:7 ; year:2017 ; number:1 ; pages:9

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1038/s41598-017-04177-8

Katalog-ID:	DOAJ063155915

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520			\|a Abstract Beauveriolide III (BeauIII) inhibited sterol O-acyltransferases 1 and 2 (SOAT1 and SOAT2), which are endoplasmic reticulum (ER) membrane proteins, in an enzyme-based assay, and selectively inhibited SOAT1 in a cell-based assay using SOAT1-/SOAT2-CHO cells. This discrepancy in SOAT inhibition by BeauIII was investigated. In the enzyme-based assay, BeauIII inhibited SOAT1 and SOAT2 to a similar extent using microsomes prepared from cells disrupted under the strongest sonication condition. In semi-intact SOAT1-/SOAT2-CHO cells prepared by a treatment with digitonin (plasma membrane permeabilized), BeauIII selectively inhibited SOAT1 (IC50; 5.0 µM (SOAT1) vs <90 µM (SOAT2)), while in those treated with saponin (plasma membrane and ER membrane permeabilized), BeauIII inhibited SOAT1 (IC50, 1.8 µM) and SOAT2 (5.9 µM). SOAT1-selective inhibition by BeauIII was reproduced in intact ER fractions prepared from SOAT1/SOAT2-CHO cells. A Western blotting analysis revealed that biotin-labeled beauveriolide bound to the SOAT1 protein prepared from SOAT1-CHO cells. We concluded that BeauIII binds to a putative active site responsible for SOAT1 that is located on the cytosolic side of the ER, while BeauIII is not accessible to the corresponding active site for SOAT2 located on the luminal side.
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700	0		\|a Lawrence L. Rudel \|e verfasserin \|4 aut
700	0		\|a Takashi Takahashi \|e verfasserin \|4 aut
700	0		\|a Takayuki Doi \|e verfasserin \|4 aut
700	0		\|a Hiroshi Tomoda \|e verfasserin \|4 aut
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912			\|a GBV_ILN_2005
912			\|a GBV_ILN_2009
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912			\|a GBV_ILN_2055
912			\|a GBV_ILN_2111
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912			\|a GBV_ILN_4037
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allfields	10.1038/s41598-017-04177-8 doi (DE-627)DOAJ063155915 (DE-599)DOAJac9b0bfcc18c4273ac51f31d3d43296a DE-627 ger DE-627 rakwb eng Taichi Ohshiro verfasserin aut Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Beauveriolide III (BeauIII) inhibited sterol O-acyltransferases 1 and 2 (SOAT1 and SOAT2), which are endoplasmic reticulum (ER) membrane proteins, in an enzyme-based assay, and selectively inhibited SOAT1 in a cell-based assay using SOAT1-/SOAT2-CHO cells. This discrepancy in SOAT inhibition by BeauIII was investigated. In the enzyme-based assay, BeauIII inhibited SOAT1 and SOAT2 to a similar extent using microsomes prepared from cells disrupted under the strongest sonication condition. In semi-intact SOAT1-/SOAT2-CHO cells prepared by a treatment with digitonin (plasma membrane permeabilized), BeauIII selectively inhibited SOAT1 (IC50; 5.0 µM (SOAT1) vs <90 µM (SOAT2)), while in those treated with saponin (plasma membrane and ER membrane permeabilized), BeauIII inhibited SOAT1 (IC50, 1.8 µM) and SOAT2 (5.9 µM). SOAT1-selective inhibition by BeauIII was reproduced in intact ER fractions prepared from SOAT1/SOAT2-CHO cells. A Western blotting analysis revealed that biotin-labeled beauveriolide bound to the SOAT1 protein prepared from SOAT1-CHO cells. We concluded that BeauIII binds to a putative active site responsible for SOAT1 that is located on the cytosolic side of the ER, while BeauIII is not accessible to the corresponding active site for SOAT2 located on the luminal side. Medicine R Science Q Keisuke Kobayashi verfasserin aut Mio Ohba verfasserin aut Daisuke Matsuda verfasserin aut Lawrence L. Rudel verfasserin aut Takashi Takahashi verfasserin aut Takayuki Doi verfasserin aut Hiroshi Tomoda verfasserin aut In Scientific Reports Nature Portfolio, 2011 7(2017), 1, Seite 9 (DE-627)663366712 (DE-600)2615211-3 20452322 nnns volume:7 year:2017 number:1 pages:9 https://doi.org/10.1038/s41598-017-04177-8 kostenfrei https://doaj.org/article/ac9b0bfcc18c4273ac51f31d3d43296a kostenfrei https://doi.org/10.1038/s41598-017-04177-8 kostenfrei https://doaj.org/toc/2045-2322 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2017 1 9
spelling	10.1038/s41598-017-04177-8 doi (DE-627)DOAJ063155915 (DE-599)DOAJac9b0bfcc18c4273ac51f31d3d43296a DE-627 ger DE-627 rakwb eng Taichi Ohshiro verfasserin aut Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Beauveriolide III (BeauIII) inhibited sterol O-acyltransferases 1 and 2 (SOAT1 and SOAT2), which are endoplasmic reticulum (ER) membrane proteins, in an enzyme-based assay, and selectively inhibited SOAT1 in a cell-based assay using SOAT1-/SOAT2-CHO cells. This discrepancy in SOAT inhibition by BeauIII was investigated. In the enzyme-based assay, BeauIII inhibited SOAT1 and SOAT2 to a similar extent using microsomes prepared from cells disrupted under the strongest sonication condition. In semi-intact SOAT1-/SOAT2-CHO cells prepared by a treatment with digitonin (plasma membrane permeabilized), BeauIII selectively inhibited SOAT1 (IC50; 5.0 µM (SOAT1) vs <90 µM (SOAT2)), while in those treated with saponin (plasma membrane and ER membrane permeabilized), BeauIII inhibited SOAT1 (IC50, 1.8 µM) and SOAT2 (5.9 µM). SOAT1-selective inhibition by BeauIII was reproduced in intact ER fractions prepared from SOAT1/SOAT2-CHO cells. A Western blotting analysis revealed that biotin-labeled beauveriolide bound to the SOAT1 protein prepared from SOAT1-CHO cells. We concluded that BeauIII binds to a putative active site responsible for SOAT1 that is located on the cytosolic side of the ER, while BeauIII is not accessible to the corresponding active site for SOAT2 located on the luminal side. Medicine R Science Q Keisuke Kobayashi verfasserin aut Mio Ohba verfasserin aut Daisuke Matsuda verfasserin aut Lawrence L. Rudel verfasserin aut Takashi Takahashi verfasserin aut Takayuki Doi verfasserin aut Hiroshi Tomoda verfasserin aut In Scientific Reports Nature Portfolio, 2011 7(2017), 1, Seite 9 (DE-627)663366712 (DE-600)2615211-3 20452322 nnns volume:7 year:2017 number:1 pages:9 https://doi.org/10.1038/s41598-017-04177-8 kostenfrei https://doaj.org/article/ac9b0bfcc18c4273ac51f31d3d43296a kostenfrei https://doi.org/10.1038/s41598-017-04177-8 kostenfrei https://doaj.org/toc/2045-2322 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2017 1 9
allfields_unstemmed	10.1038/s41598-017-04177-8 doi (DE-627)DOAJ063155915 (DE-599)DOAJac9b0bfcc18c4273ac51f31d3d43296a DE-627 ger DE-627 rakwb eng Taichi Ohshiro verfasserin aut Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Beauveriolide III (BeauIII) inhibited sterol O-acyltransferases 1 and 2 (SOAT1 and SOAT2), which are endoplasmic reticulum (ER) membrane proteins, in an enzyme-based assay, and selectively inhibited SOAT1 in a cell-based assay using SOAT1-/SOAT2-CHO cells. This discrepancy in SOAT inhibition by BeauIII was investigated. In the enzyme-based assay, BeauIII inhibited SOAT1 and SOAT2 to a similar extent using microsomes prepared from cells disrupted under the strongest sonication condition. In semi-intact SOAT1-/SOAT2-CHO cells prepared by a treatment with digitonin (plasma membrane permeabilized), BeauIII selectively inhibited SOAT1 (IC50; 5.0 µM (SOAT1) vs <90 µM (SOAT2)), while in those treated with saponin (plasma membrane and ER membrane permeabilized), BeauIII inhibited SOAT1 (IC50, 1.8 µM) and SOAT2 (5.9 µM). SOAT1-selective inhibition by BeauIII was reproduced in intact ER fractions prepared from SOAT1/SOAT2-CHO cells. A Western blotting analysis revealed that biotin-labeled beauveriolide bound to the SOAT1 protein prepared from SOAT1-CHO cells. We concluded that BeauIII binds to a putative active site responsible for SOAT1 that is located on the cytosolic side of the ER, while BeauIII is not accessible to the corresponding active site for SOAT2 located on the luminal side. Medicine R Science Q Keisuke Kobayashi verfasserin aut Mio Ohba verfasserin aut Daisuke Matsuda verfasserin aut Lawrence L. Rudel verfasserin aut Takashi Takahashi verfasserin aut Takayuki Doi verfasserin aut Hiroshi Tomoda verfasserin aut In Scientific Reports Nature Portfolio, 2011 7(2017), 1, Seite 9 (DE-627)663366712 (DE-600)2615211-3 20452322 nnns volume:7 year:2017 number:1 pages:9 https://doi.org/10.1038/s41598-017-04177-8 kostenfrei https://doaj.org/article/ac9b0bfcc18c4273ac51f31d3d43296a kostenfrei https://doi.org/10.1038/s41598-017-04177-8 kostenfrei https://doaj.org/toc/2045-2322 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2017 1 9
allfieldsGer	10.1038/s41598-017-04177-8 doi (DE-627)DOAJ063155915 (DE-599)DOAJac9b0bfcc18c4273ac51f31d3d43296a DE-627 ger DE-627 rakwb eng Taichi Ohshiro verfasserin aut Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Beauveriolide III (BeauIII) inhibited sterol O-acyltransferases 1 and 2 (SOAT1 and SOAT2), which are endoplasmic reticulum (ER) membrane proteins, in an enzyme-based assay, and selectively inhibited SOAT1 in a cell-based assay using SOAT1-/SOAT2-CHO cells. This discrepancy in SOAT inhibition by BeauIII was investigated. In the enzyme-based assay, BeauIII inhibited SOAT1 and SOAT2 to a similar extent using microsomes prepared from cells disrupted under the strongest sonication condition. In semi-intact SOAT1-/SOAT2-CHO cells prepared by a treatment with digitonin (plasma membrane permeabilized), BeauIII selectively inhibited SOAT1 (IC50; 5.0 µM (SOAT1) vs <90 µM (SOAT2)), while in those treated with saponin (plasma membrane and ER membrane permeabilized), BeauIII inhibited SOAT1 (IC50, 1.8 µM) and SOAT2 (5.9 µM). SOAT1-selective inhibition by BeauIII was reproduced in intact ER fractions prepared from SOAT1/SOAT2-CHO cells. A Western blotting analysis revealed that biotin-labeled beauveriolide bound to the SOAT1 protein prepared from SOAT1-CHO cells. We concluded that BeauIII binds to a putative active site responsible for SOAT1 that is located on the cytosolic side of the ER, while BeauIII is not accessible to the corresponding active site for SOAT2 located on the luminal side. Medicine R Science Q Keisuke Kobayashi verfasserin aut Mio Ohba verfasserin aut Daisuke Matsuda verfasserin aut Lawrence L. Rudel verfasserin aut Takashi Takahashi verfasserin aut Takayuki Doi verfasserin aut Hiroshi Tomoda verfasserin aut In Scientific Reports Nature Portfolio, 2011 7(2017), 1, Seite 9 (DE-627)663366712 (DE-600)2615211-3 20452322 nnns volume:7 year:2017 number:1 pages:9 https://doi.org/10.1038/s41598-017-04177-8 kostenfrei https://doaj.org/article/ac9b0bfcc18c4273ac51f31d3d43296a kostenfrei https://doi.org/10.1038/s41598-017-04177-8 kostenfrei https://doaj.org/toc/2045-2322 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2017 1 9
allfieldsSound	10.1038/s41598-017-04177-8 doi (DE-627)DOAJ063155915 (DE-599)DOAJac9b0bfcc18c4273ac51f31d3d43296a DE-627 ger DE-627 rakwb eng Taichi Ohshiro verfasserin aut Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Beauveriolide III (BeauIII) inhibited sterol O-acyltransferases 1 and 2 (SOAT1 and SOAT2), which are endoplasmic reticulum (ER) membrane proteins, in an enzyme-based assay, and selectively inhibited SOAT1 in a cell-based assay using SOAT1-/SOAT2-CHO cells. This discrepancy in SOAT inhibition by BeauIII was investigated. In the enzyme-based assay, BeauIII inhibited SOAT1 and SOAT2 to a similar extent using microsomes prepared from cells disrupted under the strongest sonication condition. In semi-intact SOAT1-/SOAT2-CHO cells prepared by a treatment with digitonin (plasma membrane permeabilized), BeauIII selectively inhibited SOAT1 (IC50; 5.0 µM (SOAT1) vs <90 µM (SOAT2)), while in those treated with saponin (plasma membrane and ER membrane permeabilized), BeauIII inhibited SOAT1 (IC50, 1.8 µM) and SOAT2 (5.9 µM). SOAT1-selective inhibition by BeauIII was reproduced in intact ER fractions prepared from SOAT1/SOAT2-CHO cells. A Western blotting analysis revealed that biotin-labeled beauveriolide bound to the SOAT1 protein prepared from SOAT1-CHO cells. We concluded that BeauIII binds to a putative active site responsible for SOAT1 that is located on the cytosolic side of the ER, while BeauIII is not accessible to the corresponding active site for SOAT2 located on the luminal side. Medicine R Science Q Keisuke Kobayashi verfasserin aut Mio Ohba verfasserin aut Daisuke Matsuda verfasserin aut Lawrence L. Rudel verfasserin aut Takashi Takahashi verfasserin aut Takayuki Doi verfasserin aut Hiroshi Tomoda verfasserin aut In Scientific Reports Nature Portfolio, 2011 7(2017), 1, Seite 9 (DE-627)663366712 (DE-600)2615211-3 20452322 nnns volume:7 year:2017 number:1 pages:9 https://doi.org/10.1038/s41598-017-04177-8 kostenfrei https://doaj.org/article/ac9b0bfcc18c4273ac51f31d3d43296a kostenfrei https://doi.org/10.1038/s41598-017-04177-8 kostenfrei https://doaj.org/toc/2045-2322 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_381 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2017 1 9
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authorswithroles_txt_mv	Taichi Ohshiro @@aut@@ Keisuke Kobayashi @@aut@@ Mio Ohba @@aut@@ Daisuke Matsuda @@aut@@ Lawrence L. Rudel @@aut@@ Takashi Takahashi @@aut@@ Takayuki Doi @@aut@@ Hiroshi Tomoda @@aut@@
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author	Taichi Ohshiro
spellingShingle	Taichi Ohshiro misc Medicine misc R misc Science misc Q Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells
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topic_title	Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells
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title	Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells
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title_full	Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells
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author_browse	Taichi Ohshiro Keisuke Kobayashi Mio Ohba Daisuke Matsuda Lawrence L. Rudel Takashi Takahashi Takayuki Doi Hiroshi Tomoda
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title_sort	selective inhibition of sterolo-acyltransferase 1 isozyme by beauveriolide iii in intact cells
title_auth	Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells
abstract	Abstract Beauveriolide III (BeauIII) inhibited sterol O-acyltransferases 1 and 2 (SOAT1 and SOAT2), which are endoplasmic reticulum (ER) membrane proteins, in an enzyme-based assay, and selectively inhibited SOAT1 in a cell-based assay using SOAT1-/SOAT2-CHO cells. This discrepancy in SOAT inhibition by BeauIII was investigated. In the enzyme-based assay, BeauIII inhibited SOAT1 and SOAT2 to a similar extent using microsomes prepared from cells disrupted under the strongest sonication condition. In semi-intact SOAT1-/SOAT2-CHO cells prepared by a treatment with digitonin (plasma membrane permeabilized), BeauIII selectively inhibited SOAT1 (IC50; 5.0 µM (SOAT1) vs <90 µM (SOAT2)), while in those treated with saponin (plasma membrane and ER membrane permeabilized), BeauIII inhibited SOAT1 (IC50, 1.8 µM) and SOAT2 (5.9 µM). SOAT1-selective inhibition by BeauIII was reproduced in intact ER fractions prepared from SOAT1/SOAT2-CHO cells. A Western blotting analysis revealed that biotin-labeled beauveriolide bound to the SOAT1 protein prepared from SOAT1-CHO cells. We concluded that BeauIII binds to a putative active site responsible for SOAT1 that is located on the cytosolic side of the ER, while BeauIII is not accessible to the corresponding active site for SOAT2 located on the luminal side.
abstractGer	Abstract Beauveriolide III (BeauIII) inhibited sterol O-acyltransferases 1 and 2 (SOAT1 and SOAT2), which are endoplasmic reticulum (ER) membrane proteins, in an enzyme-based assay, and selectively inhibited SOAT1 in a cell-based assay using SOAT1-/SOAT2-CHO cells. This discrepancy in SOAT inhibition by BeauIII was investigated. In the enzyme-based assay, BeauIII inhibited SOAT1 and SOAT2 to a similar extent using microsomes prepared from cells disrupted under the strongest sonication condition. In semi-intact SOAT1-/SOAT2-CHO cells prepared by a treatment with digitonin (plasma membrane permeabilized), BeauIII selectively inhibited SOAT1 (IC50; 5.0 µM (SOAT1) vs <90 µM (SOAT2)), while in those treated with saponin (plasma membrane and ER membrane permeabilized), BeauIII inhibited SOAT1 (IC50, 1.8 µM) and SOAT2 (5.9 µM). SOAT1-selective inhibition by BeauIII was reproduced in intact ER fractions prepared from SOAT1/SOAT2-CHO cells. A Western blotting analysis revealed that biotin-labeled beauveriolide bound to the SOAT1 protein prepared from SOAT1-CHO cells. We concluded that BeauIII binds to a putative active site responsible for SOAT1 that is located on the cytosolic side of the ER, while BeauIII is not accessible to the corresponding active site for SOAT2 located on the luminal side.
abstract_unstemmed	Abstract Beauveriolide III (BeauIII) inhibited sterol O-acyltransferases 1 and 2 (SOAT1 and SOAT2), which are endoplasmic reticulum (ER) membrane proteins, in an enzyme-based assay, and selectively inhibited SOAT1 in a cell-based assay using SOAT1-/SOAT2-CHO cells. This discrepancy in SOAT inhibition by BeauIII was investigated. In the enzyme-based assay, BeauIII inhibited SOAT1 and SOAT2 to a similar extent using microsomes prepared from cells disrupted under the strongest sonication condition. In semi-intact SOAT1-/SOAT2-CHO cells prepared by a treatment with digitonin (plasma membrane permeabilized), BeauIII selectively inhibited SOAT1 (IC50; 5.0 µM (SOAT1) vs <90 µM (SOAT2)), while in those treated with saponin (plasma membrane and ER membrane permeabilized), BeauIII inhibited SOAT1 (IC50, 1.8 µM) and SOAT2 (5.9 µM). SOAT1-selective inhibition by BeauIII was reproduced in intact ER fractions prepared from SOAT1/SOAT2-CHO cells. A Western blotting analysis revealed that biotin-labeled beauveriolide bound to the SOAT1 protein prepared from SOAT1-CHO cells. We concluded that BeauIII binds to a putative active site responsible for SOAT1 that is located on the cytosolic side of the ER, while BeauIII is not accessible to the corresponding active site for SOAT2 located on the luminal side.
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title_short	Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells
url	https://doi.org/10.1038/s41598-017-04177-8 https://doaj.org/article/ac9b0bfcc18c4273ac51f31d3d43296a https://doaj.org/toc/2045-2322
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author2	Keisuke Kobayashi Mio Ohba Daisuke Matsuda Lawrence L. Rudel Takashi Takahashi Takayuki Doi Hiroshi Tomoda
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up_date	2024-07-03T16:09:06.855Z
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This discrepancy in SOAT inhibition by BeauIII was investigated. In the enzyme-based assay, BeauIII inhibited SOAT1 and SOAT2 to a similar extent using microsomes prepared from cells disrupted under the strongest sonication condition. In semi-intact SOAT1-/SOAT2-CHO cells prepared by a treatment with digitonin (plasma membrane permeabilized), BeauIII selectively inhibited SOAT1 (IC50; 5.0 µM (SOAT1) vs <90 µM (SOAT2)), while in those treated with saponin (plasma membrane and ER membrane permeabilized), BeauIII inhibited SOAT1 (IC50, 1.8 µM) and SOAT2 (5.9 µM). SOAT1-selective inhibition by BeauIII was reproduced in intact ER fractions prepared from SOAT1/SOAT2-CHO cells. A Western blotting analysis revealed that biotin-labeled beauveriolide bound to the SOAT1 protein prepared from SOAT1-CHO cells. 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Selective inhibition of sterolO-acyltransferase 1 isozyme by beauveriolide III in intact cells

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