メトミオグロビン
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出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2013/11/10 00:36:26」(JST)
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Metmyoglobin is the oxidised form of the oxygen-carrying protein myoglobin. Metmyoglobin is the cause of the characteristic brown colouration of meat that occurs as it ages.
In living muscle, the concentration of metmyoglobin is vanishingly small, due to the presence of the enzyme metmyoglobin reductase, which, in the presence of the cofactor NADH and the coenzyme cytochrome b4 converts the Fe3+ in the heme prosthetic group of metmyoglobin back to the Fe2+ of normal myoglobin. In meat, which is dead muscle, the normal processes of removing metmyoglobin are prevented from effecting this repair, or alternatively the rate of metmyoglobin formation exceeds their capacity, so that there is a net accumulation of metmyoglobin as the meat ages.
External links[edit]
- Metmyoglobin at the US National Library of Medicine Medical Subject Headings (MeSH)
Proteins: hemeproteins
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Globins |
Hemoglobin
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Subunits
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Alpha locus on 16: α (HBA1, HBA2) · ζ (HBZ) · θ (HBQ1) · μ (HBM)
Beta locus on 11: β (HBB) · δ (HBD) · γ (HBG1, HBG2) · ε (HBE1)
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Tetramers
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stages of development: HbA (α2β2) · HbA2 (α2δ2) · HbF/Fetal (α2γ2) · HbE Gower 2 (α2ε2) · HbE Gower 1 (ζ2ε2)
pathology: HbH (β 4) · Barts (γ 4) · HbS (α 2β S2) · HbC (α 2β C2) · HbE (α 2β E2)
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Compounds
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Carboxyhemoglobin · Carbaminohemoglobin · Oxyhemoglobin/Deoxyhemoglobin · Sulfhemoglobin
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Other human
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Glycated hemoglobin · Methemoglobin
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Nonhuman
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Chlorocruorin · Erythrocruorin
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Other
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human: Myoglobin (Metmyoglobin) · Neuroglobin · Cytoglobin
plant: Leghemoglobin
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Other |
Cytochrome (Cytochrome b, Cytochrome P450) · Hemocyanin · Methemalbumin
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see also disorders of globin and globulin proteins
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cell/phys (coag, heme, immu, gran), csfs
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rbmg/mogr/tumr/hist, sysi/epon, btst
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drug (B1/2/3+5+6), btst, trns
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English Journal
- Post-mortem oxidative stability of three yak (Bos grunniens) muscles as influenced by animal age.
- Wen W1, Luo X2, Xia B1, Guan J2, Nie Y1, Li L1, Duan J1, Suman SP3, Sun Q4.
- Meat science.Meat Sci.2015 Jul;105:121-5. doi: 10.1016/j.meatsci.2015.03.014. Epub 2015 Mar 21.
- The influence of animal age and muscle source on the oxidative stability of yak steaks was examined. Longissimus thoracis (LT) muscles from yaks of different age groups (0.5, 1.5, 2.5, and 3.5years), and three muscle sources of LT, Psoas major (PM), and Biceps femoris (BF) from yaks of 0.5, 1.5, and
- PMID 25839885
- Species-specific effects on non-enzymatic metmyoglobin reduction in vitro.
- Elroy NN1, Rogers J2, Mafi GG1, VanOverbeke DL1, Hartson SD2, Ramanathan R3.
- Meat science.Meat Sci.2015 Jul;105:108-13. doi: 10.1016/j.meatsci.2015.03.010. Epub 2015 Mar 19.
- Our objectives were to determine the non-enzymatic metmyoglobin reduction properties of bovine, porcine, and equine myoglobins and to characterize the effects of pre-incubation of 4-hydroxy-2-nonenal (HNE) with myoglobins on non-enzymatic metmyoglobin reduction in vitro. Purified bovine, porcine, an
- PMID 25828165
- Reverse electron transport effects on NADH formation and metmyoglobin reduction.
- Belskie KM1, Van Buiten CB1, Ramanathan R2, Mancini RA3.
- Meat science.Meat Sci.2015 Jul;105:89-92. doi: 10.1016/j.meatsci.2015.02.012. Epub 2015 Mar 3.
- The objective was to determine if NADH generated via reverse electron flow in beef mitochondria can be used for electron transport-mediated reduction and metmyoglobin reductase pathways. Beef mitochondria were isolated from bovine hearts (n=5) and reacted with combinations of succinate, NAD, and mit
- PMID 25828162
Japanese Journal
- 井ノ原 康太,尾上 由季乃,木村 郁夫
- 日本水産学会誌 81(3), 456-464, 2015
- マグロ等の普通肉やブリ類,白身魚等の血合肉の鮮赤色はこれら刺身の重要な品質要素であり,色素タンパク質ミオグロビン(Mb)のメト化率は品質を表す重要な指標である。本研究では,マサバ,ゴマサバ,ブリ,マダイ,ミナミマグロの精製 Mb からデオキシ Mb,オキシ Mb,メト Mb を調製し,これらの可視部吸収スペクトルから 3 状態 Mb の等吸収点の波長(523-525 nm)と deoxyMb と …
- NAID 130005074192
- Characterization of the Interaction between Heme and a Parallel G-Quadruplex DNA Formed from d(TTAGGGT)
- Shimizu Haruna,Tai Hulin,Saito Kaori,Shibata Tomokazu,Kinoshita Masashi,Yamamoto Yasuhiko
- Bulletin of the Chemical Society of Japan 88(5), 644-652, 2015
- … The pH-dependent spin state change of the heme(Fe3+)–(d(TTAGGGT))4 complex was similar to that of metmyoglobin (T. …
- NAID 130005069506
- Characterization of the Interaction between Heme and a Parallel G-quadruplex DNA Formed from d(TTAGGGT)
- Shimizu Haruna,Tai Hulin,Saito Kaori,Shibata Tomokazu,Kinoshita Masashi,Yamamoto Yasuhiko
- Bulletin of the Chemical Society of Japan advpub(0), 2015
- … The pH-dependent spin state change of the heme(Fe3+)-(d(TTAGGGT))4 complex was similar to that of metmyoglobin (T. …
- NAID 130004801877
Related Links
- metmyoglobin met·my·o·glo·bin (mět-mī'ə-glō'bĭn) n. Abbr. metMb Myoglobin in which the ferrous ion of the heme prosthetic group is oxidized. ... Browse more topics on our blog What Is the Difference Between Discreet and Discrete?
- metmyoglobin /met·myo·glo·bin/ (met-mi″ah-glo´bin) a compound formed from myoglobin by oxidation of the ferrous to the ferric state. met·my·o·glo·bin (m t-m-gl b n) n. Abbr. metMb Myoglobin in which the ferrous ion of the heme ...
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