Cited by 1,050Hemoglobin structure and functionNitric Oxide and Endothelin EffectsHeme Oxygenase-1 and Carbon Monoxide

Blood Flow Regulation by S -Nitrosohemoglobin in the Physiological Oxygen Gradient

Stamler, Jonathan S., Jia, Li, Eu, Jerry P., McMahon, Timothy J., Demchenko, Ivan T., Bonaventura, Joseph, Gernert, Kim, Piantadosi, Claude A.·1997·Science

Abstract

The binding of oxygen to heme irons in hemoglobin promotes the binding of nitric oxide (NO) to cysteineβ93, forming S -nitrosohemoglobin. Deoxygenation is accompanied by an allosteric transition in S -nitrosohemoglobin [from the R (oxygenated) to the T (deoxygenated) structure] that releases the NO group. S -nitrosohemoglobin contracts blood vessels and decreases cerebral perfusion in the R structure and relaxes vessels to improve blood flow in the T structure. By thus sensing the physiological oxygen gradient in tissues, hemoglobin exploits conformation-associated changes in the position of cysteineβ93 SNO to bring local blood flow into line with oxygen requirements.

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Crossref · 10.1126/science.276.5321.2034

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Authors
Stamler, J. S., Jia, L., Eu, J. P., McMahon, T. J., Demchenko, I. T., Bonaventura, J., Gernert, K., & Piantadosi, C. A.
Affiliations
  • Duke University (US)
  • J. S. Stamler, Department of Medicine, Divisions of Respiratory and Cardiovascular Medicine and Department of Cell Biology, Duke University Medical Center, Room 321 MSRB, Box 2612, Durham, NC 27710, USA.
Corresponding author
Stamler, Jonathan S.
Venue
Science
Published
1997-06-27
Volume
276
Issue
5321
Pages
2034-2037
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2033240573
Cited by
1,050
References
0
Citations by year
2026: 6 · 2025: 12 · 2024: 20 · 2023: 16 · 2022: 22 · 2021: 20 · 2020: 17 · 2019: 16 · 2018: 23 · 2017: 20 · 2016: 24 · 2015: 26 · 2014: 16 · 2013: 27 · 2012: 40
FWCI
24.36
Type
journal article
Language
en
Open access
closed
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01hl052529-05)
  • National Heart, Lung, and Blood Institute (HR59130, HL 52529)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heme Oxygenase-1 and Carbon Monoxide
Keywords
S-nitrosohemoglobin, nitric oxide, hemoglobin, oxygen gradients, allosteric transition, blood flow regulation, vasodilation, vasoconstriction, cerebral perfusion, oxygen sensing
MeSH terms
Animals, Blood Pressure, Cerebrovascular Circulation, Cysteine, Hemodynamics, Hemoglobins, Mercaptoethanol, Models, Molecular, Nitric Oxide, Nitroso Compounds, Oxygen, Oxyhemoglobins, Protein Conformation, Rats, Sprague-Dawley, S-Nitrosothiols, Rats

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