title: Nuclear resonance vibrational spectroscopy (NRVS) of rubredoxin and MoFe protein crystals.
abstract: We have applied57Fe nuclear resonance vibrational spectroscopy (NRVS) for the first time to study the dynamics of Fe centers in Fe-S protein crystals, including oxidized wild type rubredoxin crystals fromPyrococcus furiosus, and the MoFe protein of nitrogenase fromAzotobacter vinelandii. Thanks to the NRVS selection rule, selectively probed vibrational modes have been observed in both oriented rubredoxin and MoFe protein crystals. The NRVS work was complemented by extended X-ray absorption fine structure spectroscopy (EXAFS) measurements on oxidized wild type rubredoxin crystals fromPyrococcus furiosus. The EXAFS spectra revealed the Fe-S bond length difference in oxidizedPfRd protein, which is qualitatively consistent with the X-ray crystal structure.
authors.affiliation: Department of Applied Science, University of California, Davis, CA 95616.
authors.forename: Yisong
authors.initials: Y
authors.lastname: Guo
authors.affiliation: Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT 59717.
authors.forename: Eric
authors.initials: E
authors.lastname: Brecht
authors.affiliation: Department of Chemistry, University of Southern California, Los Angeles, CA 90033.
authors.forename: Kristen
authors.initials: K
authors.lastname: Aznavour
authors.affiliation: Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720.
authors.forename: Jay C
authors.initials: JC
authors.lastname: Nix
authors.affiliation: Department of Applied Science, University of California, Davis, CA 95616.
authors.forename: Yuming
authors.initials: Y
authors.lastname: Xiao
authors.affiliation: Department of Applied Science, University of California, Davis, CA 95616 ; Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720.
authors.forename: Hongxin
authors.initials: H
authors.lastname: Wang
authors.affiliation: Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720.
authors.forename: Simon J
authors.initials: SJ
authors.lastname: George
authors.affiliation: Department of Chemistry, University of Southern California, Los Angeles, CA 90033.
authors.forename: Robert
authors.initials: R
authors.lastname: Bau
authors.affiliation: Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT 59717.
authors.forename: Stephen
authors.initials: S
authors.lastname: Keable
authors.affiliation: Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT 59717.
authors.forename: John W
authors.initials: JW
authors.lastname: Peters
authors.affiliation: Department of Chemistry, University of Georgia, Athens, GA 30602.
authors.forename: Michael W W
authors.initials: MW
authors.lastname: Adams
authors.affiliation: Georgia Campus, Philadelphia College of Osteopathic Medicine, Suwanee, GA 30024.
authors.forename: Francis
authors.initials: F
authors.lastname: Jenney
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Sturhahn
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439.
authors.forename: Ercan E
authors.initials: EE
authors.lastname: Alp
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439.
authors.forename: Jiyong
authors.initials: J
authors.lastname: Zhao
authors.affiliation: JASRI, SPring-8, 1-1-1 Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5198, Japan.
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Yoda
authors.affiliation: Department of Applied Science, University of California, Davis, CA 95616 ; Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 ; Department of Chemistry, University of California, Davis, CA 95616.
authors.forename: Stephen P
authors.initials: SP
authors.lastname: Cramer
keywords: 57Fe; EXAFS; Mössbauer; NRVS; nitrogenase; normal mode analysis; nuclear resonant scattering; nuclear resonant vibrational spectroscopy; rubredoxin; synchrotron radiation