Evidence map›Paper›PMID 19648278›Full record

ArticleJournal of immunology (Baltimore, Md. : 1950)2009

The binding of antigenic peptides to HLA-DR is influenced by interactions between pocket 6 and pocket 9.

Eddie A James, Antonis K Moustakas, John Bui, Randi Nouv, George K Papadopoulos, William W Kwok

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Journal of immunology (Baltimore, Md. : 1950), 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
0.8field-weighted citation impact, top 29% 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

20 citing papers in PubMed, 35 citations in OpenAlex.

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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

6 authors at 3 institutions in 2 countries.

Eddie A JamesBenaroya Research Institute at Virginia Mason, Seattle, WA 98101, USA.
Antonis K Moustakas
John Bui
Randi Nouv
George K Papadopoulos
William W Kwok
Virginia Mason Medical Center · USTechnological Educational Institute of Epirus · GRTechnological Educational Institute of the Ionian Islands · GR

Funding

NIAID NIH HHS HHSN266200400028C
6 · The paper itself

Abstract

Peptide binding to class II MHC protein is commonly viewed as a combination of discrete anchor residue preferences for pockets 1, 4, 6/7, and 9. However, previous studies have suggested cooperative effects during the peptide binding process. Investigation of the DRB1*0901 binding motif demonstrated a clear interaction between peptide binding pockets 6 and 9. In agreement with prior studies, pockets 1 and 4 exhibited clear binding preferences. Previously uncharacterized pockets 6 and 7 accommodated a wide variety of residues. However, although it was previously reported that pocket 9 is completely permissive, several substitutions at this position were unable to bind. Structural modeling revealed a probable interaction between pockets 6 and 9 through beta9Lys. Additional binding studies with doubly substituted peptides confirmed that the amino acid bound within pocket 6 profoundly influences the binding preferences for pocket 9 of DRB1*0901, causing complete permissiveness of pocket 9 when a small polar residue is anchored in pocket 6 but accepting relatively few residues when a basic residue is anchored in pocket 6. The beta9Lys residue is unique to DR9 alleles. However, similar studies with doubly substituted peptides confirmed an analogous interaction effect for DRA1/B1*0301, a beta9Glu allele. Accounting for this interaction resulted in improved epitope prediction. These findings provide a structural explanation for observations that an amino acid in one pocket can influence binding elsewhere in the MHC class II peptide binding groove.

Indexed as

Amino Acid MotifsAmino Acid SubstitutionBinding, CompetitiveEpitopes, T-LymphocyteHLA-DR3 AntigenHLA-DR alpha-ChainsHLA-DR AntigensHLA-DRB1 ChainsHLA-DR Serological SubtypesHumansPeptidesProtein BindingT-LymphocytesEpitopes, T-LymphocyteHLA-DR3 AntigenHLA-DR9 antigenHLA-DR alpha-ChainsHLA-DR AntigensHLA-DRB1 ChainsHLA-DR Serological SubtypesPeptides

Identifiers

PMID19648278
PMCPMC4061985
OpenAlexW1961623650

What OpenQuestion holds

Textmetadata
LicenceTDM
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.