Cited by 3,392Protein Kinase Regulation and GTPase SignalingReceptor Mechanisms and SignalingCellular transport and secretion

The GTPase superfamily: conserved structure and molecular mechanism

Bourne, Henry R., Sanders, David A., McCormick, Frank·1991·Nature

Abstract

GTPases are conserved molecular switches, built according to a common structural design. Rapidly accruing knowledge of individual GTPases--crystal structures, biochemical properties, or results of molecular genetic experiments--support and generate hypotheses relating structure to function in other members of the diverse family of GTPases.

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Crossref · 10.1038/349117a0

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149 of 149 references verified0 citation errors · 0 not checkable

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  • Because G-proteins have intrinsically low GTPase activity, regulatory proteins are required for spatiotemporal control of the transition between active and inactive states.

    “Rather, due to the intrinsically low GTPase activity of G-proteins, regulatory proteins are required for spatiotemporal control of the transition between active and inactive states (Fig. 1B).”
  • GTPase affinity for guanine nucleotides is extremely high (Kd 10−7-10−11), ensuring committed states that do not spontaneously interchange and do not respond to changes in cellular nucleotide concentrations.

    “The affinity of the interaction between GTPases and either guanine nucleotides is extremely high (Kd 10−7–10−11) ensuring that these are committed states that do not spontaneously interchange; they do not respond to changes in cellular nucleotide concentrations (8).”
  • KRAS proteins primarily bind GDP and are in an inactive conformation maintained by intrinsic GTP hydrolytic activity.

    “KRAS proteins primarily bind to guanosine diphosphate (GDP) and are in an inactive conformation maintained by intrinsic guanosine triphosphate (GTP) hydrolytic activity.”

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Authors
Bourne, H. R., Sanders, D. A., & McCormick, F.
Affiliations
  • University of California, San Francisco (US)
  • Whitehead Institute for Biomedical Research (US)
Venue
Nature
Published
1991-01-10
Volume
349
Issue
6305
Pages
117-127
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1977598234
Cited by
3,392
References
149
Citations by year
2026: 24 · 2025: 44 · 2024: 51 · 2023: 52 · 2022: 37 · 2021: 55 · 2020: 62 · 2019: 50 · 2018: 48 · 2017: 44 · 2016: 58 · 2015: 56 · 2014: 63 · 2013: 61 · 2012: 69
FWCI
30.15
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
Keywords
GTPase, GTPase superfamily, molecular switches, structure-function relationship, molecular mechanisms, crystal structure, molecular genetics
MeSH terms
Amino Acid Sequence, Animals, Guanosine Diphosphate, Guanosine Triphosphate, Humans, Molecular Sequence Data, Peptide Elongation Factors, Peptide Initiation Factors, Protein Conformation, Protein Processing, Post-Translational, Signal Transduction, Proto-Oncogene Proteins p21(ras), GTP-Binding Proteins, GTP Phosphohydrolase-Linked Elongation Factors

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