2PYA

Ultra-high resolution structure of P. abyssi rubredoxin W4L/R5S/A44S

Summary for 2PYA

• Entry DOI: 10.2210/pdb2pya/pdb
• Related: 1yk4 1yk5
• Descriptor: Rubredoxin, FE (III) ION, SODIUM ION, ... (4 entities in total)
• Functional Keywords: o-h...s-fe hydrogen bond, electron transport
• Biological source: Pyrococcus abyssi
• Total number of polymer chains: 1
• Total formula weight: 5890.19

Authors

Boenisch, H.,Ladenstein, R. (deposition date: 2007-05-16, release date: 2008-04-29, Last modification date: 2024-02-21)

Primary citation

Bonisch, H.,Schmidt, C.L.,Bianco, P.,Ladenstein, R.
Ultrahigh-resolution study on Pyrococcus abyssi rubredoxin: II. Introduction of an O-H...Sgamma-Fe hydrogen bond increased the reduction potential by 65 mV.
J.Biol.Inorg.Chem., 12:1163-1171, 2007

PubMed Abstract: The effect of D-H...S(gamma)-Fe hydrogen bonding on the reduction potential of rubredoxin was investigated by the introduction of an O-H...S(gamma)-Fe hydrogen bond on the surface of Pyrococcus abyssi rubredoxin. The formation of a weak hydrogen bond between Ser44-O(gamma) and Cys42-S(gamma) in mutant W4L/R5S/A44S increased the reduction potential by 56 mV. When side effects of the mutation were taken into account, the contribution of the additional cluster hydrogen bond to the reduction potential was estimated to be +65 mV. The structural analysis was based on ultrahigh-resolution structures of oxidized P. abyssi rubredoxin W4L/R5S and W4L/R5S/A44S refined to 0.69 and 0.86 A, respectively.

PubMed: 17712580
DOI: 10.1007/s00775-007-0289-8

Experimental method

X-RAY DIFFRACTION (0.86 Å)