7viz

class II photolyase MmCPDII oxidized to semiquinone TR-SFX studies (250 ns time-point)class II photolyase MmCPDII oxidized to semiquinone TR-SFX studies (250 ns time-point)

Structural highlights 7viz is a 1 chain structure with sequence from Methanosarcina mazei Go1. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.4Å Ligands: , Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q8PYK9_METMA Publication Abstract from PubMed Flavin coenzymes are universally found in biological redox reactions. DNA photolyases, with their flavin chromophore (FAD), utilize blue light for DNA repair and photoreduction. The latter process involves two single-electron transfers to FAD with an intermittent protonation step to prime the enzyme active for DNA repair. Here we use time-resolved serial femtosecond X-ray crystallography to describe how light-driven electron transfers trigger subsequent nanosecond-to-microsecond entanglement between FAD and its Asn/Arg-Asp redox sensor triad. We found that this key feature within the photolyase-cryptochrome family regulates FAD re-hybridization and protonation. After first electron transfer, the FAD(*-) isoalloxazine ring twists strongly when the arginine closes in to stabilize the negative charge. Subsequent breakage of the arginine-aspartate salt bridge allows proton transfer from arginine to FAD(*-). Our molecular videos demonstrate how the protein environment of redox cofactors organizes multiple electron/proton transfer events in an ordered fashion, which could be applicable to other redox systems such as photosynthesis. Serial crystallography captures dynamic control of sequential electron and proton transfer events in a flavoenzyme.,Maestre-Reyna M, Yang CH, Nango E, Huang WC, Ngurah Putu EPG, Wu WJ, Wang PH, Franz-Badur S, Saft M, Emmerich HJ, Wu HY, Lee CC, Huang KF, Chang YK, Liao JH, Weng JH, Gad W, Chang CW, Pang AH, Sugahara M, Owada S, Hosokawa Y, Joti Y, Yamashita A, Tanaka R, Tanaka T, Luo F, Tono K, Hsu KC, Kiontke S, Schapiro I, Spadaccini R, Royant A, Yamamoto J, Iwata S, Essen LO, Bessho Y, Tsai MD Nat Chem. 2022 Apr 7. pii: 10.1038/s41557-022-00922-3. doi:, 10.1038/s41557-022-00922-3. PMID:35393554 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

spinqualitylabelsall models 7viz, resolution 2.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image