Cited by 111Sleep and Wakefulness ResearchNeuropeptides and Animal PhysiologyCircadian rhythm and melatonin

Peptidoglycans as promoters of slow-wave sleep. II. Somnogenic and pyrogenic activities of some naturally occurring muramyl peptides; correlations with mass spectrometric structure determination.

Open access
Krueger, J M, Karnovsky, M L, Martin, S A, Pappenheimer, J R, Walter, J, Biemann, K·1984·Journal of Biological Chemistry

Abstract

The structures of components of the sleep-promoting material purified from human urine were established by fast atom bombardment-mass spectrometry, as reported in the accompanying paper (Martin, S. A., Karnovsky, M. L., Krueger, J. M., Pappenheimer, J. R., and Biemann, K. (1984) J. Biol. Chem. 259, 12652-12658). We report here that two substances isolated from that preparation, viz. N-acetylglucosaminyl-1,6 -anhydro-N-acetylmuramyl-Ala-gamma-Glu-diaminopimelyl-Ala) and that compound lacking the terminal alanine, are active as somnogens. Cerebro-intraventricular administration of 1 pmol of the glycotetrapeptide was sufficient to induce prolonged excess sleep in rabbits. A similar substance obtained from Brevibacterium divaricatum in which the free carboxyls of the glutamic and diaminopimelic moieties, indicated above, were amidated (N-acetylglucosaminyl-1,6-anhydro-N-anhydromura-myl-Ala-iso- Gln- epsilon-amido-diaminopimelyl -Ala-Ala) was not active as a promoter of slow-wave sleep. Deamidation of this peptide to a mixture of the free dicarboxylic forms produced a somnogenic substance. Our findings show that in addition to the muramyl form of peptidoglycan monomers, the anhydro muramyl form, with no reducing end, is compatible with somnogenic activity. Furthermore, the data obtained with a natural product amplify our earlier observations with smaller synthetic molecules of the importance of amidation/deamidation in the structure-activity relationships of muramyl peptides.

Integrity signals

Registry

Crossref · 10.1016/s0021-9258(18)90796-9

Cites

15 of 15 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

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?

  • The first bacterial component demonstrated to alter sleep was a specific muramyl peptide derived from bacterial cell wall peptidoglycans.

    “The first bacterial component demonstrated to alter sleep was a specific muramyl peptide derived from bacterial cell wall peptidoglycans (Krueger et al, 1984).”

    From Sleep health: Reciprocal regulation of sleep and innate immunity (2017) · cites this paper as Krueger et al, 1984

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Krueger, J. M., Karnovsky, M. L., Martin, S. A., Pappenheimer, J. R., Walter, J., & Biemann, K.
Affiliations
Massachusetts Institute of Technology (US)
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1984-10
Volume
259
Issue
20
Pages
12659-12662
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1588673077
Cited by
111
References
15
Citations by year
2026: 3 · 2025: 1 · 2023: 2 · 2022: 1 · 2021: 3 · 2020: 4 · 2019: 1 · 2018: 1 · 2017: 4 · 2016: 4 · 2015: 1 · 2014: 1 · 2013: 3 · 2012: 4
FWCI
4.27
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
Keywords
peptidoglycan, slow-wave sleep, muramyl peptides, pyrogenicity, structure-activity relationship, deamidation, amidation, human urine
MeSH terms
Acetylmuramyl-Alanyl-Isoglutamine, Animals, Biological Assay, Body Temperature, Cerebral Ventricles, Glycopeptides, Humans, Male, Peptidoglycan, Rabbits, Sleep Stages, Mass Spectrometry, Structure-Activity Relationship

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