Protein Information

Name myoglobin
Synonyms MB; Myoglobin; PVALB; Myoglobins

Compound Information

Name rotenone
CAS

Reference List

PubMed Abstract RScore(About this table)
1858930 Doeller JE, Wittenberg BA: Myoglobin function and energy metabolism of isolated cardiac myocytes: effect of sodium nitrite. Am J Physiol. 1991 Jul;261(1 Pt 2):H53-62.

However, inhibition of electron transport by rotenone does block myoglobin-mediated oxygen uptake.
86(1,1,1,6) Details
9067905 Zager RA, Burkhart K: Myoglobin toxicity in proximal human kidney cells: roles of Fe, Ca2+, H2O2, and terminal mitochondrial electron transport. Kidney Int. 1997 Mar;51(3):728-38.

Blockade of site 2 (antimycin) and site 3 (azide), but not site 1 (rotenone), mitochondrial electron transport significantly reduced myoglobin cytotoxicity.
6(0,0,0,6) Details
19178274 Ramanathan R, Mancini RA, Konda MR: Effects of lactate on beef heart mitochondrial oxygen consumption and muscle darkening. J Agric Food Chem. 2009 Feb 25;57(4):1550-5.

Rotenone reduced (p < 0.05) lactate-mediated darkening in bovine cardiac muscle homogenates.
Lactate-induced beef color darkening may be due to increased oxygen consumption by mitochondria, which out-competes myoglobin for oxygen and results in dark colored muscle.
1(0,0,0,1) Details
5062477 Wu CS, Duffy P, Brown WD: Interaction of myoglobin and cytochrome C. J Biol Chem. 1972 Mar 25;247(6):1899-903.

1(0,0,0,1) Details
15969532 Tang J, Faustman C, Mancini RA, Seyfert M, Hunt MC: Mitochondrial reduction of metmyoglobin: dependence on the electron transport chain. J Agric Food Chem. 2005 Jun 29;53(13):5449-55.

Reduction of ferric myoglobin (metmyoglobin, MetMb) to its ferrous form is important for maintaining fresh meat color because only reduced myoglobin can bind oxygen to form the consumer-preferred cherry red color in fresh meat.
MetMb reduction was increased by rotenone addition and decreased by malonic acid (p < 0.05); the reduction was completely abolished by additions of antimycin A or myxothiazol when compared with controls (p < 0.05).
1(0,0,0,1) Details
14713113 Gnaiger E: Oxygen conformance of cellular respiration. Adv Exp Med Biol. 2003;543:39-55.

In cultured cells, the pronounced oxygen uptake above mitochondrial saturation at air-level oxygen pressure cannot be inhibited by rotenone and antimycin A, amounting to > 20 % of routine respiration in fibroblasts.
Thus mitochondrial respiration proceeds at 90% of its hyperbolic maximum at the p50 of myoglobin, suggesting the possibility of a small but significant oxygen limitation even under normoxia in active muscle.
1(0,0,0,1) Details