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El Omari, Kamel ; Duman, Ramona ; Mykhaylyk, Vitaliy ; Orr, Christian M. ; Latimer-Smith, Merlyn ; Winter, Graeme ; Grama, Vinay ; Qu, Feng ; Bountra, Kiran ; Kwong, Hok Sau ; Romano, Maria ; Reis, Rosana I. ; Vogeley, Lutz ; Vecchia, Luca ; Owen, C. David ; Wittmann, Sina ; Renner, Max ; Senda, Miki ; Matsugaki, Naohiro ; Kawano, Yoshiaki ; Bowden, Thomas A. ; Moraes, Isabel ; Grimes, Jonathan M. ; Mancini, Erika J. ; Walsh, Martin A. ; Guzzo, Cristiane R. ; Owens, Raymond J. ; Jones, E. Yvonne ; Brown, David G. ; Stuart, Dave I. ; Beis, Konstantinos ; Wagner, Armin

• Tipo de documento: Artigo Científico
• Fonte: COMMUNICATIONS CHEMISTRY; v. 6, n. 1, p. 11-pg., 2023-10-12.

Resumo

Despite recent advances in cryo-electron microscopy and artificial intelligence-based model predictions, a significant fraction of structure determinations by macromolecular crystallography still requires experimental phasing, usually by means of single-wavelength anomalous diffraction (SAD) techniques. Most synchrotron beamlines provide highly brilliant beams of X-rays of between 0.7 and 2 angstrom wavelength. Use of longer wavelengths to access the absorption edges of biologically important lighter atoms such as calcium, potassium, chlorine, sulfur and phosphorus for native-SAD phasing is attractive but technically highly challenging. The long-wavelength beamline I23 at Diamond Light Source overcomes these limitations and extends the accessible wavelength range to lambda = 5.9 angstrom. Here we report 22 macromolecular structures solved in this extended wavelength range, using anomalous scattering from a range of elements which demonstrate the routine feasibility of lighter atom phasing. We suggest that, in light of its advantages, long-wavelength crystallography is a compelling option for experimental phasing. Structural biology has undergone a revolution thanks to cryo-EM and artificial intelligence-based model predictions; nonetheless, experimental phasing continues to be essential. Here, the authors utilize the long-wavelength I23 beamline at Diamond Light Source to solve macromolecular structures using single-wavelength anomalous diffraction techniques, showcasing their proficiency in phasing with lighter atoms. (AU)

• Processo FAPESP: 16/08414-7 - Compreensão das bases moleculares e estruturais de proteínas envolvidas na sinalização do c-di-GMP e do sistema de secreção tipo II em Leptospira interrogans serovar copenhageni
• Beneficiário: Cristiane Rodrigues Guzzo Carvalho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/00195-2 - Compreensão das redes de sinalização c-di-GMP e do sistema de secreção tipo II presentes no patógeno humano Leptospira interrogans Copenhageni
• Beneficiário: Cristiane Rodrigues Guzzo Carvalho
• Modalidade de apoio: Auxílio à Pesquisa - Regular