Article(id=1314923043382719056, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314922986466009203, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1754582400000, receivedDateStr=2025-08-08, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1791431683631, onlineDateStr=2026-10-08, pubDate=1773936000000, pubDateStr=2026-03-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1791431683631, onlineIssueDateStr=2026-10-08, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1791431683631, creator=13701087609, updateTime=1791431683631, updator=13701087609, issue=Issue{id=1314922986466009203, tenantId=1146029695717560320, journalId=1234093305789726721, year='2026', volume='46', issue='3', pageStart='1185', pageEnd='1776', issueExtLink='null', onlineDate='null', pubDate='1773936000000', pubDateStr='2026-03-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1791431670061, creator='13701087609', updateTime=1791431955369, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1314924183251935526, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314922986466009203, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1314924183251935527, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1314922986466009203, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1417, endPage=1425, ext={EN=ArticleExt(id=1314923043588239953, articleId=1314923043382719056, tenantId=1146029695717560320, journalId=1234093305789726721, language=EN, title=Kinetics of reaction between Fe(II)-ligand and c-type cytochrome under acidic conditions, columnId=1234106386360103680, journalTitle=China Environmental Science, columnName=Water Pollution Control, runingTitle=null, highlight=null, articleAbstract=

The c-type cytochrome (c-Cyts) is a key protein in microbial oxidation of Fe(II). However, the reaction process and influencing factors of ligand-bound Fe(II) with c-Cyts under acidic conditions remain unclear. In this study, Fe(II)-EDTA and a model c-type cytochrome (c-Cyts) were used to investigate the mechanism of microbial Fe(II) oxidation under acidic conditions with various environmental factors, including anoxic/oxic conditions, pH, and initial Fe(II)-EDTA concentration. A stopped-flow spectrophotometer was employed to study the reduction kinetics of c-Cyts, while the electrochemical properties of Fe(II) and the distribution of different Fe(II) species were characterized. Under anoxic conditions, the reduction rate of c-Cyts increased with increasing pH and Fe(II)-EDTA concentration. At 20μmol/L Fe(II)-EDTA, the apparent rate constants (kapp) were 0.841 and 6.802s-1 at pH 3.5 and pH 5.0, respectively. At pH 5.0, the kapp increased to 13.028s-1 when the initial Fe(II)-EDTA concentration increased to 80μmol/L. The increase in pH and Fe(II)-EDTA concentration enhanced the proportion of FeEDTA2- and intensified the redox peaks of Fe(II), indicating greater Fe(II) reactivity and thus a faster c-Cyts reduction rate. Compared to anoxic conditions, c-Cyts reduction was inhibited under oxic conditions. This inhibitory effect of oxygen decreased as the pH increased. At pH 3.5 and 4.0, c-Cyts reduction was completely inhibited. At pH 4.5, the kapp decreased from 5.402s-1 (anoxic) to 1.658s-1 (oxic); and at pH 5.0, the kapp slightly decreased from 6.802s-1 (anoxic) to 6.454s-1 (oxic). This is attributed to the slower reaction between Fe(II)-EDTA and c-Cyts at lower pH, whereas the competing reaction of Fe(II)-EDTA with oxygen is favored, producing reactive oxygen species that further accelerate the reoxidation of reduced c-Cyts. This study elucidates the critical mechanisms of the reaction between Fe(II)-ligand and c-Cyts, providing deeper molecular-level insight into the microbial Fe(II) oxidation process.

, authors=Yun-lu YIN1, Kuan CHENG2, Ying WANG2, Tong-xu LIU2, Xiao-min LI3, *, authorsList=Yun-lu YIN, Kuan CHENG, Ying WANG, Tong-xu LIU, Xiao-min LI, authorCompany=null, correspAuthors=Xiao-min LI, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1314923043835703890, articleId=1314923043382719056, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=酸性条件下配体态Fe(II)与细胞色素c反应动力学, columnId=1234106386565624579, journalTitle=中国环境科学, columnName=水污染与控制, runingTitle=null, highlight=null, articleAbstract=

细胞色素c(c-Cyts)是微生物驱动亚铁氧化的关键蛋白,然而,酸性条件下配体态亚铁与c-Cyts的反应过程及影响因素尚不明确.本文选取Fe(II)-EDTA和c-Cyts为配体态亚铁和铁氧化蛋白的模式反应物,设置厌氧/好氧、不同pH值和初始亚铁浓度等条件,运用停留光谱仪研究c-Cyts还原动力学,表征亚铁的电化学特性和物种组成.结果发现,厌氧条件下,c-Cyts还原速率随pH值升高和Fe(II)-EDTA浓度增加而提高.20μmol/LFe(II)-EDTA浓度下,pH 3.5和5.0时c-Cyts还原的表观速率常数(kapp)分别是0.841和6.802s-1.pH 5.0,Fe(II)-EDTA浓度增加至80μmol/L时,kapp增至13.028s-1.升高pH值或Fe(II)-EDTA浓度后,配体态FeEDTA2-占比增加,亚铁氧化还原峰信号增强,表明亚铁活性增强,导致c-Cyts还原速率增加.相较于厌氧条件,好氧条件下c-Cyts还原受到抑制,且氧气的抑制作用随pH值增加而减弱.pH 3.5和4.0时c-Cyts还原被完全抑制;pH 4.5时kapp由厌氧的5.402s-1降至1.658s-1;pH 5.0时,kapp仅由厌氧的6.802s-1下降至6.454s-1.这是因为在酸性条件下,pH值越低,Fe(II)-EDTA与c-Cyts的反应越慢,但其与氧气的反应却越快,不仅更有利于氧气与Fe(II)-EDTA反应,其产生的活性氧物种还能进一步加速还原态c-Cyts的重新氧化.研究阐明了配体态亚铁与c-Cyts反应的关键机制,并从分子层面加深对微生物亚铁氧化过程的理解.

, authors=殷云璐1, 程宽2, 王莹2, 刘同旭2, 李晓敏3, *, authorsList=殷云璐, 程宽, 王莹, 刘同旭, 李晓敏, authorCompany=null, correspAuthors=李晓敏, authorNote=

殷云璐(1995-),女,河南商丘人,助理实验师,硕士,主要研究方向为微生物亚铁氧化过程研究.发表论文3篇..

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* 责任作者,研究员,
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殷云璐(1995-),女,河南商丘人,助理实验师,硕士,主要研究方向为微生物亚铁氧化过程研究.发表论文3篇..

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殷云璐(1995-),女,河南商丘人,助理实验师,硕士,主要研究方向为微生物亚铁氧化过程研究.发表论文3篇..

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酸性条件下配体态Fe(II)与细胞色素c反应动力学
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殷云璐 1 , 程宽 2 , 王莹 2 , 刘同旭 2 , 李晓敏 3, *
中国环境科学 | 水污染与控制 2026,46(3): 1417-1425
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中国环境科学 |水污染与控制 2026 , 46 (3) : 1417 -1425
酸性条件下配体态Fe(II)与细胞色素c反应动力学
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殷云璐(1995-),女,河南商丘人,助理实验师,硕士,主要研究方向为微生物亚铁氧化过程研究.发表论文3篇..

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殷云璐(1995-),女,河南商丘人,助理实验师,硕士,主要研究方向为微生物亚铁氧化过程研究.发表论文3篇..

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殷云璐1 , 程宽2, 王莹2, 刘同旭2, 李晓敏3, *
作者信息
  • 1.华南师范大学地理科学学院,广东 广州 510631
  • 2.广东省科学院生态环境与土壤研究所,华南土壤污染控制与修复国家地方联合工程研究中心,广东省农业环境综合治理重点实验室,广东 广州 510650
  • 3.华南师范大学环境研究院,广东省化学品污染与环境安全重点实验室,环境理论化学教育部重点实验室,广东 广州 510006
通讯作者:
* 责任作者,研究员,
作者简介:

殷云璐(1995-),女,河南商丘人,助理实验师,硕士,主要研究方向为微生物亚铁氧化过程研究.发表论文3篇..

Kinetics of reaction between Fe(II)-ligand and c-type cytochrome under acidic conditions
Yun-lu YIN1 , Kuan CHENG2, Ying WANG2, Tong-xu LIU2, Xiao-min LI3, *
Affiliations
  • 1.School of Geography, South China Normal University, Guangzhou 510631, China
  • 2.Guangdong Provincial Key Laboratory of Integrated Agro-environmental Pollution Control and Management, National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
  • 3.Ministry of Education Key Laboratory of Theoretical Chemistry of Environment, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, Environmental Research Institute, South China Normal University, Guangzhou 510006, China
出版时间: 2026-03-20
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细胞色素c(c-Cyts)是微生物驱动亚铁氧化的关键蛋白,然而,酸性条件下配体态亚铁与c-Cyts的反应过程及影响因素尚不明确.本文选取Fe(II)-EDTA和c-Cyts为配体态亚铁和铁氧化蛋白的模式反应物,设置厌氧/好氧、不同pH值和初始亚铁浓度等条件,运用停留光谱仪研究c-Cyts还原动力学,表征亚铁的电化学特性和物种组成.结果发现,厌氧条件下,c-Cyts还原速率随pH值升高和Fe(II)-EDTA浓度增加而提高.20μmol/LFe(II)-EDTA浓度下,pH 3.5和5.0时c-Cyts还原的表观速率常数(kapp)分别是0.841和6.802s-1.pH 5.0,Fe(II)-EDTA浓度增加至80μmol/L时,kapp增至13.028s-1.升高pH值或Fe(II)-EDTA浓度后,配体态FeEDTA2-占比增加,亚铁氧化还原峰信号增强,表明亚铁活性增强,导致c-Cyts还原速率增加.相较于厌氧条件,好氧条件下c-Cyts还原受到抑制,且氧气的抑制作用随pH值增加而减弱.pH 3.5和4.0时c-Cyts还原被完全抑制;pH 4.5时kapp由厌氧的5.402s-1降至1.658s-1;pH 5.0时,kapp仅由厌氧的6.802s-1下降至6.454s-1.这是因为在酸性条件下,pH值越低,Fe(II)-EDTA与c-Cyts的反应越慢,但其与氧气的反应却越快,不仅更有利于氧气与Fe(II)-EDTA反应,其产生的活性氧物种还能进一步加速还原态c-Cyts的重新氧化.研究阐明了配体态亚铁与c-Cyts反应的关键机制,并从分子层面加深对微生物亚铁氧化过程的理解.

酸性环境  /  亚铁  /  乙二胺四乙酸  /  细胞色素c  /  氧气

The c-type cytochrome (c-Cyts) is a key protein in microbial oxidation of Fe(II). However, the reaction process and influencing factors of ligand-bound Fe(II) with c-Cyts under acidic conditions remain unclear. In this study, Fe(II)-EDTA and a model c-type cytochrome (c-Cyts) were used to investigate the mechanism of microbial Fe(II) oxidation under acidic conditions with various environmental factors, including anoxic/oxic conditions, pH, and initial Fe(II)-EDTA concentration. A stopped-flow spectrophotometer was employed to study the reduction kinetics of c-Cyts, while the electrochemical properties of Fe(II) and the distribution of different Fe(II) species were characterized. Under anoxic conditions, the reduction rate of c-Cyts increased with increasing pH and Fe(II)-EDTA concentration. At 20μmol/L Fe(II)-EDTA, the apparent rate constants (kapp) were 0.841 and 6.802s-1 at pH 3.5 and pH 5.0, respectively. At pH 5.0, the kapp increased to 13.028s-1 when the initial Fe(II)-EDTA concentration increased to 80μmol/L. The increase in pH and Fe(II)-EDTA concentration enhanced the proportion of FeEDTA2- and intensified the redox peaks of Fe(II), indicating greater Fe(II) reactivity and thus a faster c-Cyts reduction rate. Compared to anoxic conditions, c-Cyts reduction was inhibited under oxic conditions. This inhibitory effect of oxygen decreased as the pH increased. At pH 3.5 and 4.0, c-Cyts reduction was completely inhibited. At pH 4.5, the kapp decreased from 5.402s-1 (anoxic) to 1.658s-1 (oxic); and at pH 5.0, the kapp slightly decreased from 6.802s-1 (anoxic) to 6.454s-1 (oxic). This is attributed to the slower reaction between Fe(II)-EDTA and c-Cyts at lower pH, whereas the competing reaction of Fe(II)-EDTA with oxygen is favored, producing reactive oxygen species that further accelerate the reoxidation of reduced c-Cyts. This study elucidates the critical mechanisms of the reaction between Fe(II)-ligand and c-Cyts, providing deeper molecular-level insight into the microbial Fe(II) oxidation process.

acid conditions  /  Fe(II)  /  EDTA  /  cytochrome c  /  oxygen
殷云璐, 程宽, 王莹, 刘同旭, 李晓敏. 酸性条件下配体态Fe(II)与细胞色素c反应动力学. 中国环境科学, 2026 , 46 (3) : 1417 -1425 .
Yun-lu YIN, Kuan CHENG, Ying WANG, Tong-xu LIU, Xiao-min LI. Kinetics of reaction between Fe(II)-ligand and c-type cytochrome under acidic conditions[J]. China Environmental Science, 2026 , 46 (3) : 1417 -1425 .
  • 中国博士后科学基金资助项目(2024M760595)
  • 广东省现代农业产业技术体系创新团队建设项目(2024CXTD17)
  • 广东省重点实验室开放基金资助项目(2023B1212060044)
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  • 接收时间:2025-08-08
  • 首发时间:2026-10-08
  • 出版时间:2026-03-20
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  • 收稿日期:2025-08-08
基金
中国博士后科学基金资助项目(2024M760595)
广东省现代农业产业技术体系创新团队建设项目(2024CXTD17)
广东省重点实验室开放基金资助项目(2023B1212060044)
作者信息
    1.华南师范大学地理科学学院,广东 广州 510631
    2.广东省科学院生态环境与土壤研究所,华南土壤污染控制与修复国家地方联合工程研究中心,广东省农业环境综合治理重点实验室,广东 广州 510650
    3.华南师范大学环境研究院,广东省化学品污染与环境安全重点实验室,环境理论化学教育部重点实验室,广东 广州 510006

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2种不同金属材料的力学参数
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属
Genus
种数
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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