Bioactive by-products

R1128 B is a non-steroidal estrogen-receptor antagonist produced by Streptomyces sp. No. 1128. The IC50 value of R1128 B for partially purified rat uterine cytosol receptor was 1.2 x 10(-7) M.

R1128 C is a non-steroidal estrogen-receptor antagonist produced by Streptomyces sp. No. 1128. The IC50 value of R1128 C for partially purified rat uterine cytosol receptor was 2.6 x 10(-7) M.

R1128 D is a non-steroidal estrogen-receptor antagonist produced by Streptomyces sp. No. 1128. The IC50 value of R1128 D for partially purified rat uterine cytosol receptor was 2.7 x 10(-7) M.

R176502 is a bafilolide metabolite with potent antiproliferative activity, which is produced by Micromonospora sp. JS1035. It inhibits proliferation of MCF-7, HT-29, K562/C1000 and Malme-3M cells with IC50 values of 1.29 ± 0.35, 0.61 ± 0.04, 9.29 ± 7.35, 7.96 ± 2.75 nmol/L.

RES-701-2 is an endothelin type B receptor antagonist produced by Streptomyces sp. RE-701. It selectively inhibits the ET-1 binding to endothelin type B receptor.

RES-1149-1 is an endothelin type B receptor antagonist produced by Aspergillus sp. RE-1149. It selectively inhibits the ET-1 binding to endothelin type B receptor with IC50 value of 1.5 µmol/L.

RES-1149-2 is an endothelin type B receptor antagonist produced by Aspergillus sp. RE-1149. It selectively inhibits the ET-1 binding to endothelin type B receptor with IC50 value of 20 µmol/L.

RES-1214-1 is an endothelin type A receptor antagonist produced by Pestalotiopsis sp. RE-1214. It selectively inhibits the ET-1 binding to endothelin type A receptor with IC50 value of 1.5 µmol/L.

RES-1214-2 is an endothelin type A receptor antagonist produced by Pestalotiopsis sp. RE-1214. It selectively inhibits the ET-1 binding to endothelin type A receptor with IC50 value of 20 µmol/L.

RP-1551-1 is a compound in the class of azaphilone produced by Penicillium sp. SPC-21609. It inhibits the binding of PDGF AA to the extracellular domain of PDGF alpha-receptor potentially via reacting with amino groups on the alpha-receptor extracellular domain.

RP-1551-2 is a compound in the class of azaphilone produced by Penicillium sp. SPC-21609. It inhibits the binding of PDGF AA to the extracellular domain of PDGF alpha-receptor.

RP-1551-3 is a compound in the class of azaphilone produced by Penicillium sp. SPC-21609. It inhibits the binding of PDGF AA to the extracellular domain of PDGF alpha-receptor.

RP-1551-4 is a compound in the class of azaphilone produced by Penicillium sp. SPC-21609. It inhibits the binding of PDGF AA to the extracellular domain of PDGF alpha-receptor.

RP-1551-5 is a compound in the class of azaphilone produced by Penicillium sp. SPC-21609. It inhibits the binding of PDGF AA to the extracellular domain of PDGF alpha-receptor.

RP-1551-6 is a compound in the class of azaphilone produced by Penicillium sp. SPC-21609. It inhibits the binding of PDGF AA to the extracellular domain of PDGF alpha-receptor.

RP-1551-7 is a compound in the class of azaphilone produced by Penicillium sp. SPC-21609. It inhibits the binding of PDGF AA to the extracellular domain of PDGF alpha-receptor.

RP-1551-8 is a compound in the class of azaphilone produced by Penicillium sp. SPC-21609. It inhibits the binding of PDGF AA to the extracellular domain of PDGF alpha-receptor.

RP-1551-9 is a compound in the class of azaphilone produced by Penicillium sp. SPC-21609. It inhibits the binding of PDGF AA to the extracellular domain of PDGF alpha-receptor.

RP-1776 is a cyclic peptide isolated from the culture broth of Streptomyces sp. KY11784. It selectively inhibits the binding of PDGF BB to the extracellular domain of the PDGF beta-receptor with an IC50 value of 11 ± 6 µmol/L.

RP-66453 is a secondary peptide metabolite produced by Streptomyces sp. A 9738. It can selectively bind to neurotensin receptor.