CTP : phosphocholine cytidylyltransferase in rat lung: relationship between cytosolic and membrane forms
dc.contributor.author | Feldman, Douglas A. | en_US |
dc.contributor.author | Rounsifer, Mary Ellen | en_US |
dc.contributor.author | Charles, Linda G. | en_US |
dc.contributor.author | Weinhold, Paul A. | en_US |
dc.date.accessioned | 2006-05-10T15:35:51Z | |
dc.date.available | 2006-05-10T15:35:51Z | |
dc.date.issued | 1990-06-28 | en_US |
dc.identifier.citation | Feldman, Douglas A., Rounsifer, Mary Ellen, Charles, Linda, Weinhold, Paul A. (1990/06/28)."CTP : phosphocholine cytidylyltransferase in rat lung: relationship between cytosolic and membrane forms." Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism 1045(1): 49-57. <http://hdl.handle.net/2027.42/28515> | en_US |
dc.identifier.uri | http://www.sciencedirect.com/science/article/B6T1X-47F7018-VH/2/de92805633b189c261d5fa2febfdf2b9 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/28515 | |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=2164421&dopt=citation | en_US |
dc.description.abstract | The purpose of these studies was to determine the properties of the membrane-bound cytidylyltransferase in adult lung and to assess the relationship between the microsomal enzyme and the two forms of cytidylyltransferase in cytosol. Microsomes, isolated by glycerol density centrifugation, contained significantly less cytidylyltransferase than microsomes isolated by differential centrifugation (11.6 +/- 3.2 vs. 30 +/- 11 nmol/min per g lung). The released activity was recovered as H-form cytidylyltransferase. Cytidylyltransferase activity was not removed from microsomes by washing of the microsomal pellet with homogenizing buffer. Triton X 100 extracted all of the cytidylyltransferase from microsomes. The extracted activity was similar to H-form. Chlorpromazine dissociated microsomal enzyme to L-form. Chlorpromazine has been shown previously to dissociate H-form to L-form. These results suggested that microsomal cytidylyltransferase existed in a form similar if not identical to cytosolic H-form. In vitro translocation experiments demonstrated that the L-form of cytidylyltransferase was the species which binds to microsomal membranes. Triton X 100 extraction of microsomes from translocations experiments removed the bound enzyme activity. Glycerol density fractionation indicated that the activity in the Triton extract was H-form cytidylyltransferase. We concluded that the active lipoprotein form of cytidylyltransferase (H-form) is the membrane-associated form of cytidylyltransferase in adult lung; that it is formed after the L-form binds to microsomal membranes and that cytosolic H-form is released from the membrane. | en_US |
dc.format.extent | 42637 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.extent | 1119000 bytes | |
dc.format.mimetype | text/plain | |
dc.format.mimetype | text/plain | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_US | en_US |
dc.publisher | Elsevier | en_US |
dc.title | CTP : phosphocholine cytidylyltransferase in rat lung: relationship between cytosolic and membrane forms | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Materials Science and Engineering | en_US |
dc.subject.hlbsecondlevel | Chemistry | en_US |
dc.subject.hlbsecondlevel | Chemical Engineering | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.subject.hlbtoplevel | Engineering | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | V.A. Medical Center and Department of Biological Chemistry, University of Michigan, Ann Arbor, MI, U.S.A. | en_US |
dc.contributor.affiliationum | V.A. Medical Center and Department of Biological Chemistry, University of Michigan, Ann Arbor, MI, U.S.A. | en_US |
dc.contributor.affiliationum | V.A. Medical Center and Department of Biological Chemistry, University of Michigan, Ann Arbor, MI, U.S.A. | en_US |
dc.contributor.affiliationum | V.A. Medical Center and Department of Biological Chemistry, University of Michigan, Ann Arbor, MI, U.S.A. | en_US |
dc.identifier.pmid | 2164421 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/28515/3/0000312.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1016/0005-2760(90)90202-9 | en_US |
dc.identifier.source | Biochimica et Biophysica Acta | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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