Evidence map›Paper›PMID 1910169›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America1991

Somatic mutation in constant regions of mouse lambda 1 light chains.

N Motoyama, H Okada, T Azuma

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 1991. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
3.0field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

14 citing papers in PubMed, 56 citations in OpenAlex.

  1. Article
  2. Article
  3. Genome-wide somatic hypermutation.Proceedings of the National Academy of Sciences of the United States of America · 2004
    Article
  4. Article
  5. The reverse transcriptase model of somatic hypermutation.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2001
    Review
  6. Article
  7. Article
  8. Article
  9. The promotion of V region hypermutation.The Journal of experimental medicine · 1997
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

N MotoyamaDepartment of Molecular Biology, Nagoya City University School of Medicine, Japan.
H Okada
T Azuma
Nagoya City University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

To study the distribution of somatic mutation, we determined nucleotide sequences of rearranged lambda 1-chain genomic DNA from four hybridomas obtained from C57BL/6 mice that had been immunized with (4-hydroxy-3-nitrophenyl)acetyl-conjugated chicken gamma globulin. In total, 114 nucleotide substitutions were observed, with neither insertion nor deletion. Sixty-one mutations occurred in the variable-joining region genes (V lambda 1-J lambda 1) and 49 in joining-constant (J lambda 1-C lambda 1) introns. Although frequency decreased with distance from the V lambda 1-J lambda 1 coding region, somatic mutations occurred in the entire J lambda 1-C lambda 1 intron and even in the C lambda 1 region. We found four nucleotide substitutions in C lambda 1 genes, all of which were replacement mutations. Therefore, the mechanism responsible for somatic mutation is operative into the C lambda 1 exons. Nucleotide sequences of rearranged but inactive lambda 2-chain genes from two hybridomas were also examined and compared with those of lambda 1-chain genes. The clustering of replacement mutations in complementarity-determining regions in the inactive lambda 2-chain genes similar to the active lambda 1-chain genes suggested a mechanism that induces somatic mutation preferentially in this region even in the absence of antigenic selection.

Indexed as

Gene Rearrangement, B-Lymphocyte, Light ChainGenes, ImmunoglobulinAnimalsAntibody DiversityBase SequenceCloning, MolecularImmunoglobulin Constant RegionsImmunoglobulin lambda-ChainsMiceMolecular Sequence DataMutationOligonucleotidesPolymerase Chain ReactionImmunoglobulin Constant RegionsImmunoglobulin lambda-ChainsOligonucleotides

Identifiers

PMID1910169
PMCPMC52419
OpenAlexW1964933368

What OpenQuestion holds

Textmetadata
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.