Engineering ascorbate peroxidase activity into cytochrome c peroxidase.
Engineering ascorbate peroxidase activity into cytochrome c peroxidase.
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DOI:
10.1021/bi8007565
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发表时间:
2008-09-30
期刊:
影响因子:
2.9
通讯作者:
Poulos, Thomas L.
中科院分区:
文献类型:
--
作者:
Meharenna, Yergalem T.;Oertel, Patricia;Bhaskar, B.;Poulos, Thomas L.
Cytochrome c peroxidase (CCP) and ascorbate peroxidase (APX) have very similar structures, and yet neither CCP nor APX exhibit each others activities with respect to reducing substrates. APX has a unique substrate binding site near the heme propionates where ascorbate H-bonds with a surface Arg and one heme propionate (Sharp et al. (2003) Nat. Struc. Biol. 10, 303–307). The corresponding region in CCP has a much longer surface loop and the critical Arg residue that is required for ascorbate binding in APX is Asn in CCP. In order to convert CCP into an APX, the ascorbate binding loop and critical arginine were engineered into CCP to give the CCP2APX mutant. The mutant crystal structure shows that the engineered site is nearly identical to that found in APX. While wild type CCP shows no APX activity, CCP2APX catalyzes the peroxidation of ascorbate at a rate of ≈ 12 min−1 indicating that the engineered ascorbate binding loop can bind ascorbate.
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影响因子:
2.9
作者:
Gengenbach, A;Syn, S;Lu, Y
通讯作者:
Lu, Y
影响因子:
2.9
作者:
Mandelman, D;Jamal, J;Poulos, TL
通讯作者:
Poulos, TL
DOI:
10.1107/s0907444998003254
发表时间:
1998-09-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子:
--
作者:
Brunger, AT;Adams, PD;Warren, GL
通讯作者:
Warren, GL
DOI:
10.6028/jres.015.032
发表时间:
1935-11-01
影响因子:
--
作者:
Fowler, RM;Bright, HA
通讯作者:
Bright, HA
影响因子:
2.9
作者:
DEFELIPPIS, MR;MURTHY, CP;KLAPPER, MH
通讯作者:
KLAPPER, MH