Evidence map›Paper›PMID 18417471›Full record

ArticleThe Journal of biological chemistry2008

Impact of phosphorylation and phosphorylation-null mutants on the activity and deamination specificity of activation-induced cytidine deaminase.

Phuong Pham, Marcus B Smolka, Peter Calabrese, Alice Landolph, Ke Zhang, Huilin Zhou, Myron F Goodman

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
2.5field-weighted citation impact, top 11% 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

35 citing papers in PubMed, 46 citations in OpenAlex.

  1. Insights on SNPs of Human Activation-Induced Cytidine Deaminase AID.International journal of molecular sciences · 2025
    Review
  2. Review
  3. Article
  4. Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Review
  15. Article
  16. Article
  17. Review
  18. Review
  19. Article
  20. 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

7 authors at 4 institutions in 2 countries.

Phuong PhamDepartment of Biological Sciences, University of Southern California, Los Angeles, California 90089-2910, USA.
Marcus B Smolka
Peter Calabrese
Alice Landolph
Ke Zhang
Huilin Zhou
Myron F Goodman
University of Southern California · USLudwig Cancer Research · BEUniversity of California, Los Angeles · USUniversity of California, San Diego · US

Funding

Biochemical Basis of Somatic HypermutationR01ES013192 · NIEHS · UNIVERSITY OF SOUTHERN CALIFORNIA · PI GOODMAN, MYRON · 2004 to 2013
$3.7M
ERROR CORRECTION IN DNA SYNTHESIS--A BIOCHEMICAL STUDYR37GM021422 · NIGMS · UNIVERSITY OF SOUTHERN CALIFORNIA · PI GOODMAN, MYRON · 2000 to 2009
$3.5M
Regulation and functions of DNA damage checkpoint kinases in YeastR01GM080469 · NIGMS · LUDWIG INSTITUTE FOR CANCER RES LTD · PI ZHOU, HUILIN · 2007 to 2011
$1.4M
Biochemical Basis of Somatic HypermutationR56ES013192 · NIEHS · UNIVERSITY OF SOUTHERN CALIFORNIA · PI GOODMAN, MYRON · 2015 to 2015
$150k
NIEHS NIH HHS ES013192NIGMS NIH HHS GM080469NIGMS NIH HHS R01 GM080469NIGMS NIH HHS R37GM21422
6 · The paper itself

Abstract

Activation-induced cytidine deaminase (AID) initiates somatic hypermutation and class switch recombination in B cells by deaminating C --> U on transcribed DNA. Here we analyze the role of phosphorylation and phosphorylation-null mutants on the biochemical behavior of AID, including enzyme specific activity, processivity, deamination spectra, deamination motif specificity, and transcription-dependent deamination in the presence and absence of RPA. We show that a small fraction of recombinant human AID expressed in Sf9 insect cells is phosphorylated at previously identified residues Ser(38) and Thr(27) and also at Ser(41) and Ser(43). S43P AID has been identified in a patient with hyper-IgM immunodeficiency syndrome. Ser-substituted phosphorylation-null mutants (S38A, S41A, S43A, and S43P) exhibit wild type (WT) activity on single-stranded DNA. Deamination of transcribed double-stranded DNA is similar for WT and mutant AID and occurs with or without RPA. Although WT and AID mutants catalyze processive deamination favoring canonical WRC hot spot motifs (where W represents A/T and R is A/G), their deamination spectra differ significantly. The differences between the WT and AID mutants appear to be caused by the replacement of Ser as opposed to an absence of phosphorylation. The spectral differences reflect a marked change in deamination efficiencies in two motifs, GGC and AGC, which are preferred by mutant AID but disfavored by WT AID. Both motifs occur with exceptionally high frequency in human switch regions, suggesting a possible relationship between AID deamination specificity and a loss of antibody diversification.

Indexed as

MutationAICDA (Activation-Induced Cytidine Deaminase)Amino Acid MotifsAnimalsCell LineCytidine DeaminaseDNADNA Mutational AnalysisDNA, Single-StrandedHumansInsectaMass SpectrometryModels, BiologicalPhosphorylationSerineTranscription, GeneticAICDA (Activation-Induced Cytidine Deaminase)Cytidine DeaminaseDNADNA, Single-StrandedSerine

Identifiers

PMID18417471
PMCPMC2427360
OpenAlexW2023254248

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.