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Volumn 129, Issue 2, 2007, Pages 361-370

Rotational-echo double-resonance NMR distance measurements for the tubulin-bound paclitaxel conformation

Author keywords

[No Author keywords available]

Indexed keywords

DIMERS; DRUG PRODUCTS; MOLECULAR STRUCTURE; POLYMERIZATION; TUMORS; X RAY CRYSTALLOGRAPHY;

EID: 33846201709     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja0656604     Document Type: Article
Times cited : (76)

References (62)
  • 5
    • 84886117962 scopus 로고    scopus 로고
    • Cragg, G. M, Kingston, D. G. I, Newman, D. J, Eds, CRC Press: Boca Raton, FL
    • (a) Kingston, D. G. I. In Anticancer Agents from Natural Products; Cragg, G. M., Kingston, D. G. I., Newman, D. J., Eds.; CRC Press: Boca Raton, FL, 2005; pp 89-122.
    • (2005) In Anticancer Agents from Natural Products , pp. 89-122
    • Kingston, D.G.I.1
  • 28
    • 0001892688 scopus 로고    scopus 로고
    • A related study, which has not yet been reported in full, used the radio frequency driven dipolar recoupling technique. This work indicated a distance of 6.5 Å between the fluorines of 2-(p-fluorobenzoyl)-3′-(p- fluorophenyl)-10-acetyldocetaxel (3), but it is not clear that this result is directly comparable to the REDOR results reported here: Ojima, I.; Inoue, T.; Chakravarty, S. J. Fluorine Chem. 1999, 97, 3-10.
    • A related study, which has not yet been reported in full, used the radio frequency driven dipolar recoupling technique. This work indicated a distance of 6.5 Å between the fluorines of 2-(p-fluorobenzoyl)-3′-(p- fluorophenyl)-10-acetyldocetaxel (3), but it is not clear that this result is directly comparable to the REDOR results reported here: Ojima, I.; Inoue, T.; Chakravarty, S. J. Fluorine Chem. 1999, 97, 3-10.
  • 38
    • 33846188404 scopus 로고    scopus 로고
    • A reviewer asked whether there is any non-specific binding of the paclitaxel analogues to tubulin. We do not believe that there is any significant non-specific binding in these samples. The molar ratio of the ligand/tubulin dimer was 1:1, and the Kd for paclitaxel binding to microtubules is about 15 nM. Even if the affinities of the REDOR probes for the paclitaxel site on tubulin were 100-fold less than the affinity of paclitaxel for microtubules, > 95% of the probe would be bound to the protein under the conditions used to create the samples. Since the REDOR probes are nearly as active as paclitaxel as promoters of tubulin assembly, and since the structural perturbation between paclitaxel and the analogues is very small, it is reasonable to assume that the spectra are obtained on a homogeneous, fully bound sample
    • d for paclitaxel binding to microtubules is about 15 nM. Even if the affinities of the REDOR probes for the paclitaxel site on tubulin were 100-fold less than the affinity of paclitaxel for microtubules, > 95% of the probe would be bound to the protein under the conditions used to create the samples. Since the REDOR probes are nearly as active as paclitaxel as promoters of tubulin assembly, and since the structural perturbation between paclitaxel and the analogues is very small, it is reasonable to assume that the spectra are obtained on a homogeneous, fully bound sample.
  • 40
    • 33846191854 scopus 로고    scopus 로고
    • U.S. Patent 5,861,748
    • Schaefer, J.; McKay, R. A. U.S. Patent 5,861,748, 1999.
    • (1999)
    • Schaefer, J.1    McKay, R.A.2
  • 47
    • 33846257557 scopus 로고    scopus 로고
    • Atomic coordinates of the computationally refined T-Taxol-tubulin structure can be found in the Supporting Information of ref 17
    • Atomic coordinates of the computationally refined T-Taxol-tubulin structure can be found in the Supporting Information of ref 17.
  • 48
    • 33846254853 scopus 로고    scopus 로고
    • We thank a reviewer for suggesting that we add this section
    • We thank a reviewer for suggesting that we add this section.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.