Mode of action of streptolydigin.

نویسندگان

  • C Siddhikol
  • J W Erbstoeszer
  • B Weisblum
چکیده

Streptolydigin and rifamycin inhibit the catalytic function of ribonucleic acid (RNA) polymerase. Streptolydigin can inhibit polymerization after the reaction has started, whereas rifamycin is effective only if it is preincubated with RNA polymerase prior to the addition of substrates. The same relationships are observed with respect to these two antibiotics if the nucleoside triphosphate-pyrophosphate exchange reaction is used in the assay system. The inhibitory effect of streptolydigin is reversible by further addition of RNA polymerase but not by addition of deoxyribonucleic acid to the assay system.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Tirandamycin, an inhibitor of bacterial ribonucleic acid polymerase.

The antibiotic tirandamycin (a 3-acyltetramic acid structurally related to streptolydigin) specifically inhibits transcription by interfering with the function of bacterial ribonucleic acid polymerase. Ribonucleic acid polymerases from rat liver nuclei are not subject to tirandamycin inhibition. Qualitatively, the mode of action of the antibiotic is identical to that of streptolydigin in inhibi...

متن کامل

Participation of putative glycoside hydrolases SlgC1 and SlgC2 in the biosynthesis of streptolydigin in Streptomyces lydicus

Two genes of the streptolydigin gene cluster in Streptomyces lydicus cluster encode putative family 16 glycoside hydrolases. Both genes are expressed when streptolydigin is produced. Inactivation of these genes affects streptolydigin production when the microorganism is grown in minimal medium containing either glycerol or d-glucans as carbon source. Streptolydigin yields in S. lydicus were inc...

متن کامل

A Neuropeptide Courier for δ-Opioid Receptors?

model predicts that streptolydigin should trap NTP in the pre-insertion site in such an elongation complex structure. Additionally, this cocrystal would be of great interest because it might reveal a specific role for the trigger loop in nucleotide binding or insertion. Since it is often disordered in RNAP crystal structures, the highly flexible trigger loop has received less attention as a key...

متن کامل

Inhibition of RNA Polymerase by Streptolydigin: No Cycling Allowed

Bacterial RNA polymerase is a common target for many antibiotics. In two recent papers in Cell and Molecular Cell, and describe a structural basis for inhibition of bacterial RNA polymerase by the antibiotic streptolydigin. Streptolydigin may prevent distortion of a "bridge" alpha helix postulated to occur during the nucleotide addition cycle of RNA polymerase or may block a small movement of t...

متن کامل

Streptolydigin, an inhibitor of oxidative phosphorylation in rat liver mitochondria.

Streptolydigin interferes with oxidative phosphorylation in rat liver mitochondria. The agent acts primarily as an uncoupler of respiration-associated phosphorylation but also impairs respiration to various degrees depending on the substrate. Streptolydigin partially inhibits electron flow at a point past the cytochrome b and prior to the cytochrome c reduction site. Streptolydigin also inhibit...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Journal of bacteriology

دوره 99 1  شماره 

صفحات  -

تاریخ انتشار 1969