Cited by 116Nitric Oxide and Endothelin EffectsHemoglobin structure and functionMetal-Catalyzed Oxygenation Mechanisms

Differences in Three Kinetic Parameters Underpin the Unique Catalytic Profiles of Nitric-oxide Synthases I, II, and III

Open access
Santolini, Jérôme, Meade, Abigail L., Stuehr, Dennis J.·2001·Journal of Biological Chemistry

Abstract

We previously reported the existence of a special auto-regulation property of neuronal nitric-oxide synthase (NOS) based on NO near-geminate combination and partial trapping of neuronal NOS (nNOS) through a futile regenerating pathway. On this basis, we developed a kinetic simulation model that was proven to predict nNOS catalytic specificities and mutations effects (Santolini, J., Adak, S., Curran, C. M., and Stuehr, D. J. (2001) J. Biol. Chem. 276, 1233-1243; Adak, S., Santolini, J., Tikunova, S., Wang, Q., Johnson, J. D., and Stuehr, D. J. (2001) J. Biol. Chem. 276, 1244-1252). Here we show that the same model simulates and explains the distinct catalytic behaviors of inducible and endothelial NOS (iNOS and eNOS). Their marked differences were linked to variations in three basic parameters (rates of ferric heme reduction, ferric heme.NO dissociation, and ferrous heme.NO oxidation) that together control partitioning between futile and productive pathways and their relative rates. We also incorporated feedback inhibition into the kinetic model to account for potential rebinding of accumulated solution NO. The model accurately simulated the different relative impacts of both NOS.NO interactions (near-geminate combination of NO versus rebinding of solution NO) on catalytic behavior of each NOS isoform, including their speed and extent of heme.NO complex accumulation, K(m) for O(2), and propensity to transform NO into a higher oxide. Thus, individual catalytic behavior of any NOS can be understood through a single unified kinetic model. Because the model defines how different settings of individual kinetic parameters control regulation by two distinct NOS.NO interactions, it sheds light on mechanisms, structural features, and scope of NOS regulation and its physiologic impact.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1074/jbc.m108666200

Cites

68 of 68 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Tissue from the left ventricle of heart failure patients showed an increase in superoxide production and a decrease in MnSOD protein levels and activity.

    “Notably, tissue from the left ventricle of heart failure patients showed an increase in superoxide production and a decrease in MnSOD protein levels and activity, consistent with a role for increased mitochondrial superoxide in the pathogenesis of heart failure (814).”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 3

  1. Giuffre `, A., Stubauer, G., Sarti, P., Brunori, M., Zumft, W. G., Buse, G., and Soulimane, T. (1999) Proc. Natl. Acad. Sci. U. S. A. 96, 14718 -14723
  2. Murphy, M. E., and Sies, H. (1991) Proc. Natl. Acad. Sci. U. S. A. 88, 10860 -10864
  3. Marnett, L. J., and Kennedy, T. A. (1995) in Cytochrome P450, Plenum Press, New York, pp. 49 -80

Cited by

Sorted by citations

Authors
Santolini, J., Meade, A. L., & Stuehr, D. J.
Affiliations
Cleveland Clinic (US)
Corresponding author
Stuehr, Dennis J.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2001-12
Volume
276
Issue
52
Pages
48887-48898
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2056420994
Cited by
116
References
68
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 3 · 2018: 5 · 2017: 3 · 2016: 3 · 2015: 1 · 2014: 2 · 2013: 7 · 2012: 3
FWCI
4.58
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
  • Physical Sciences › Chemistry › Inorganic Chemistry › Metal-Catalyzed Oxygenation Mechanisms
Keywords
nitric oxide synthase, neuronal nitric oxide synthase, inducible nitric oxide synthase, endothelial nitric oxide synthase, NOS isoforms, autoregulation, product inhibition, nitric oxide metabolism
MeSH terms
Heme, Kinetics, Models, Chemical, NADP, Nitric Oxide, Oxidation-Reduction, Nitric Oxide Synthase, Nitric Oxide Synthase Type II, Nitric Oxide Synthase Type I, Nitric Oxide Synthase Type III

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review