TY - JOUR
T1 - Exploring structural and computational contrasts in Myoglobins
T2 - Implications for thermal treatment-induced Sulfmyoglobin formation
AU - Ramírez-Suárez, Juan C.
AU - Álvarez-Armenta, Andrés
AU - Huerta-Ocampo, Jose Angel
AU - López-Zavala, Alonso A.
AU - Corona-Martínez, David O.
AU - Sotelo-Mundo, Rogerio R.
AU - Pacheco-Aguilar, Ramón
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2024/12/1
Y1 - 2024/12/1
N2 - Greening of tuna metmyoglobin (MetMb) by thermal treatment (TT) and free cysteine is associated with sulfmyoglobin (SulfMb) production. This greening reaction (GR) was once thought to occur only in tuna species. However, recent research has revealed that not all tuna species exhibit this behavior, and it can also occur in horse MetMb. Thus, the present study aimed to compare the GR-reactive (Katsuwonus pelamis and Equus caballus) and GR-unreactive (Sarda chiliensis and Euthynnus lineatus) MetMb using UV–vis spectrometry during TT (60 °C/30 min and free cysteine) to monitor the GR. We used molecular dynamics (MD) simulation to assess the stability of the heme group during TT. We discovered that using GR-unreactive MetMb resulted in an incomplete GR without producing SulfMb. Additionally, our MD simulations indicated that Met85 presence in the heme cavity from GR-unreactive is responsible for the heme group instability and displacement of distal His during TT.
AB - Greening of tuna metmyoglobin (MetMb) by thermal treatment (TT) and free cysteine is associated with sulfmyoglobin (SulfMb) production. This greening reaction (GR) was once thought to occur only in tuna species. However, recent research has revealed that not all tuna species exhibit this behavior, and it can also occur in horse MetMb. Thus, the present study aimed to compare the GR-reactive (Katsuwonus pelamis and Equus caballus) and GR-unreactive (Sarda chiliensis and Euthynnus lineatus) MetMb using UV–vis spectrometry during TT (60 °C/30 min and free cysteine) to monitor the GR. We used molecular dynamics (MD) simulation to assess the stability of the heme group during TT. We discovered that using GR-unreactive MetMb resulted in an incomplete GR without producing SulfMb. Additionally, our MD simulations indicated that Met85 presence in the heme cavity from GR-unreactive is responsible for the heme group instability and displacement of distal His during TT.
KW - Greening
KW - Molecular dynamics
KW - Myoglobin
KW - Tuna
UR - http://www.scopus.com/inward/record.url?scp=85199104493&partnerID=8YFLogxK
U2 - 10.1016/j.foodchem.2024.140504
DO - 10.1016/j.foodchem.2024.140504
M3 - Artículo
C2 - 39033634
AN - SCOPUS:85199104493
SN - 0308-8146
VL - 460
JO - Food Chemistry
JF - Food Chemistry
M1 - 140504
ER -