Publication:
Soybean dihydrolipoamide dehydrogenase (ferric leghemoglobin reductase 2) interacts with and reduces ferric rice non-symbiotic hemoglobin 1

Consultable a partir de

Date

2013

Authors

Gopalasubramaniama, Sabarinathan K.
Kondapallib, Kalyan C.
Millán-Pacheco, César
Pastor, Nina
Stemmler, Timothy L.
Arredondo-Peter, Raúl

Director

Publisher

Simplex Academic Publishers
Acceso abierto / Sarbide irekia
Artículo / Artikulua
Versión aceptada / Onetsi den bertsioa

Project identifier

Abstract

Ferrous oxygenated hemoglobins (Hb2+O2) autoxidize to ferric Hb3+, but Hb3+ is reduced to Hb2+ by enzymatic and non-enzymatic mechanisms. We characterized the interaction between the soybean ferric leghemoglobin reductase 2 (FLbR2) and ferric rice non-symbiotic Hb1 (Hb13+). Spectroscopic analysis showed that FLbR2 reduces Hb13+. Analysis by tryptophan fluorescence quenching showed that FLbR2 interacts with Hb13+, however the use of ITC and IEF techniques revealed that this interaction is weak. In silico modeling showed that predicted FLbR2 and native Hb13+ interact at the FAD-binding domain of FLbR2 and the CD-loop and helix F of Hb13+.

Description

Keywords

Fluorescence quenching, Hemoglobin, Isothermal calorimetry, Non-symbiotic, Oryza sativa, Protein-protein interaction

Department

Ciencias del Medio Natural / Natura Ingurunearen Zientziak

Faculty/School

Degree

Doctorate program

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