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University of Massachusetts Medical School

Cellular and Molecular Physiology

Program in Gene Function and Expression Publications and Presentations

Articles 1 - 4 of 4

Full-Text Articles in Life Sciences

Drosophila Sirt2/Mammalian Sirt3 Deacetylates Atp Synthase Beta And Regulates Complex V Activity, Motiur Rahman, Niraj K. Nirala, Alka Singh, Lihua Julie Zhu, Kaori Taguchi, Takeshi Bamba, Eiichiro Fukusaki, Leslie M. Shaw, David G. Lambright, Jairaj K. Acharya, Usha R. Acharya Jul 2014

Drosophila Sirt2/Mammalian Sirt3 Deacetylates Atp Synthase Beta And Regulates Complex V Activity, Motiur Rahman, Niraj K. Nirala, Alka Singh, Lihua Julie Zhu, Kaori Taguchi, Takeshi Bamba, Eiichiro Fukusaki, Leslie M. Shaw, David G. Lambright, Jairaj K. Acharya, Usha R. Acharya

Program in Gene Function and Expression Publications and Presentations

Adenosine triphosphate (ATP) synthase beta, the catalytic subunit of mitochondrial complex V, synthesizes ATP. We show that ATP synthase beta is deacetylated by a human nicotinamide adenine dinucleotide (NAD(+))-dependent protein deacetylase, sirtuin 3, and its Drosophila melanogaster homologue, dSirt2. dsirt2 mutant flies displayed increased acetylation of specific Lys residues in ATP synthase beta and decreased complex V activity. Overexpression of dSirt2 increased complex V activity. Substitution of Lys 259 and Lys 480 with Arg in human ATP synthase beta, mimicking deacetylation, increased complex V activity, whereas substitution with Gln, mimicking acetylation, decreased activity. Mass spectrometry and proteomic experiments from ...


Transcriptional Regulation Of Caenorhabditis Elegans Foxo/Daf-16 Modulates Lifespan, Ankita Bansal, Eun-Soo Kwon, Darryl Conte Jr., Haibo Liu, Michael J. Gilchrist, Lesley T. Macneil, Heidi A. Tissenbaum Apr 2014

Transcriptional Regulation Of Caenorhabditis Elegans Foxo/Daf-16 Modulates Lifespan, Ankita Bansal, Eun-Soo Kwon, Darryl Conte Jr., Haibo Liu, Michael J. Gilchrist, Lesley T. Macneil, Heidi A. Tissenbaum

Program in Gene Function and Expression Publications and Presentations

BACKGROUND: Insulin/IGF-1 signaling plays a central role in longevity across phylogeny. In C. elegans, the forkhead box O (FOXO) transcription factor, DAF-16, is the primary target of insulin/IGF-1 signaling, and multiple isoforms of DAF-16 (a, b, and d/f) modulate lifespan, metabolism, dauer formation, and stress resistance. Thus far, across phylogeny modulation of mammalian FOXOs and DAF-16 have focused on post-translational regulation with little focus on transcriptional regulation. In C. elegans, we have previously shown that DAF-16d/f cooperates with DAF-16a to promote longevity. In this study, we generated transgenic strains expressing near-endogenous levels of either daf-16a or ...


Ceramide Transfer Protein Deficiency Compromises Organelle Function And Leads To Senescence In Primary Cells, Raghavendra Pralhada Rao, Luana Scheffer, Sargur M. Srideshikan, Velayoudame Parthibane, Teresa Kosakowska-Cholody, M. Athar Masood, Kunio Nagashima, Prabhakar Gudla, Stephen Lockett, Usha Acharya, Jairaj K. Acharya Mar 2014

Ceramide Transfer Protein Deficiency Compromises Organelle Function And Leads To Senescence In Primary Cells, Raghavendra Pralhada Rao, Luana Scheffer, Sargur M. Srideshikan, Velayoudame Parthibane, Teresa Kosakowska-Cholody, M. Athar Masood, Kunio Nagashima, Prabhakar Gudla, Stephen Lockett, Usha Acharya, Jairaj K. Acharya

Program in Gene Function and Expression Publications and Presentations

Ceramide transfer protein (CERT) transfers ceramide from the endoplasmic reticulum (ER) to the Golgi complex. Its deficiency in mouse leads to embryonic death at E11.5. CERT deficient embryos die from cardiac failure due to defective organogenesis, but not due to ceramide induced apoptotic or necrotic cell death. In the current study we examined the effect of CERT deficiency in a primary cell line, namely, mouse embryonic fibroblasts (MEFs). We show that in MEFs, unlike in mutant embryos, lack of CERT does not lead to increased ceramide but causes an accumulation of hexosylceramides. Nevertheless, the defects due to defective sphingolipid ...


Functional Activity Of Rlim/Rnf12 Is Regulated By Phosphorylation-Dependent Nucleo-Cytoplasmic Shuttling, Baowei Jiao, Naoko Taniguchi-Ishigaki, Cenap Gungor, Marvin A. Peters, Ya-Wen Chen, Sabine Riethdorf, Alexander Drung, Leanne G. Ahronian, Jongdae Shin, Rachna Pagnis, Klaus Pantel, Taro Tachibana, Brian C. Lewis, Steven A. Johnsen, Ingolf Bach Oct 2013

Functional Activity Of Rlim/Rnf12 Is Regulated By Phosphorylation-Dependent Nucleo-Cytoplasmic Shuttling, Baowei Jiao, Naoko Taniguchi-Ishigaki, Cenap Gungor, Marvin A. Peters, Ya-Wen Chen, Sabine Riethdorf, Alexander Drung, Leanne G. Ahronian, Jongdae Shin, Rachna Pagnis, Klaus Pantel, Taro Tachibana, Brian C. Lewis, Steven A. Johnsen, Ingolf Bach

Program in Gene Function and Expression Publications and Presentations

The X-linked gene Rnf12 encodes the ubiquitin ligase RLIM/Rnf12 which serves as a major sex-specific epigenetic regulator of female mouse nurturing tissues. Early during embryogenesis, RLIM/Rnf12 expressed from the maternal allele is crucial for the development of extraembryonic trophoblast cells. In contrast, in mammary glands of pregnant and lactating adult females RLIM/Rnf12 expressed from the paternal allele functions as a critical survival factor for milk producing alveolar cells. While RLIM/Rnf12 is detected mostly in the nucleus, little is known about how and in which cellular compartment(s) RLIM/Rnf12 mediates its biological functions. Here, we demonstrate ...