Novel fluorescent analogues for transmembrane movement study of polyprenyl phosphates
摘要:
In order to investigate the transmembrane movement of polyprenyl phosphate across biological membranes, NBD (7-nitrobenz-2-oxa-1,3-diazol-4-yl)-labeled polyprenyl phosphate analogues were prepared. These analogues proved to be possible tools for a direct observation of the transmembrane flip-flop movement of polyprenyl phosphates by use of a sodium dithionitequenching procedure. (c) 2006 Elsevier Ltd. All rights reserved.
Novel fluorescent analogues for transmembrane movement study of polyprenyl phosphates
摘要:
In order to investigate the transmembrane movement of polyprenyl phosphate across biological membranes, NBD (7-nitrobenz-2-oxa-1,3-diazol-4-yl)-labeled polyprenyl phosphate analogues were prepared. These analogues proved to be possible tools for a direct observation of the transmembrane flip-flop movement of polyprenyl phosphates by use of a sodium dithionitequenching procedure. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis of putative chain terminators of mycobacterial arabinan biosynthesis
作者:Iain A. Smellie、Sanjib Bhakta、Edith Sim、Antony J. Fairbanks
DOI:10.1039/b704788f
日期:——
The synthesis of a variety of arabinose derivatives that have been modified at C-5 was achieved from D-arabinose. The 5-fluoro and 5-methoxy compounds were converted into the corresponding farnesyl phosphodiesters as putative chain terminators of mycobacterial arabinan biosynthesis. Biological testing of these materials revealed no effective anti-mycobacterial activity.
Synthesis of 2-deoxy-2-fluoro analogs of polyprenyl β-d-arabinofuranosyl phosphates
作者:Maju Joe、Todd L. Lowary
DOI:10.1016/j.carres.2006.08.020
日期:2006.11
Described is the synthesis of polyprenyl 2-deoxy-2-fluoro-beta-D-arabinofuranosyl phosphate derivatives, including an analog of decaprenyl P-D-arabinofuranosyl phosphate, the donor species used by the arabinosyltransferases involved in mycobacterial cell-wall biosynthesis. The targets were synthesized via a route involving the synthesis of a protected beta-D-arabinofuranosyl phosphate derivative, its coupling with a polyprenyl trichloroacetimidate, and then deprotection of the resulting product. The use of arabinofuranosyl phosphates with the monosaccharide hydroxyl groups protected as either silyl ethers or benzoate esters was explored. Although the coupling yields between the phosphate and polyprenyl trichloroacetimidates were comparable with either type of protecting group, access to the benzoyl-protected derivative was more efficient and therefore gave the products in higher overall yield. (c) 2006 Elsevier Ltd. All rights reserved.
Stereoselective synthesis of farnesylphosphoryl β-d-arabinofuranose
作者:Avraham Liav、Patrick J. Brennan
DOI:10.1016/j.tetlet.2005.02.151
日期:2005.4
Decaprenylphosphoryl beta-D-arabinofuranose (DPA) is a key arabinose donor in mycobacteria. In an effort to establish a practical synthetic scheme for DPA, the synthesis of nerylphosphoryl and farnesylphosphoryl beta-D-arabinofuranoses has been developed. The products were obtained by coupling of a suitably protected P-D-arabinofuranosyl phosphate intermediate with activated forms of the C-10 nerol and C-15 trans,trans-farnesol and subsequent deprotection. (c) 2005 Elsevier Ltd. All rights reserved.