3mrr

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Crystal Structure of MHC class I HLA-A2 molecule complexed with Human Prostaglandin Transporter decapeptide

Structural highlights

3mrr is a 3 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.6Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

SO2A1_HUMAN Defects in SLCO2A1 are the cause of hypertrophic osteoarthropathy, primary, autosomal recessive, type 2 (PHOAR2) [MIM:614441. PHOAR2 is a disease characterized by digital clubbing, periostosis, acroosteolysis, painful joint enlargement, and variable features of pachydermia that include thickened facial skin and a thickened scalp. Other developmental anomalies include delayed closure of the cranial sutures and congenital heart disease.[1] [2] [3] [4]

Function

SO2A1_HUMAN May mediate the release of newly synthesized prostaglandins from cells, the transepithelial transport of prostaglandins, and the clearance of prostaglandins from the circulation. Transports PGD2, as well as PGE1, PGE2 and PGF2A.

Publication Abstract from PubMed

The structural rules governing peptide/MHC (pMHC) recognition by T cells remain unclear. To address this question, we performed a structural characterization of several HLA-A2/peptide complexes and assessed in parallel their antigenicity, by analyzing the frequency of the corresponding Ag-specific naive T cells in A2(+) and A2(-) individuals, as well as within CD4(+) and CD8(+) subsets. We were able to find a correlation between specific naive T cell frequency and peptide solvent accessibility and/or mobility for a subset of moderately prominent peptides. However, one single structural parameter of the pMHC complexes could not be identified to explain each peptide antigenicity. Enhanced pMHC antigenicity was associated with both highly biased TRAV usage, possibly reflecting favored interaction between particular pMHC complexes and germline TRAV loops, and peptide structural features allowing interactions with a broad range of permissive CDR3 loops. In this context of constrained TCR docking mode, an optimal peptide solvent exposed surface leading to an optimal complementarity with TCR interface may constitute one of the key features leading to high frequency of specific T cells. Altogether our results suggest that frequency of specific T cells depends on the fine-tuning of several parameters, the structural determinants governing TCR-pMHC interaction being just one of them.

Analysis of relationships between peptide/MHC structural features and naive T cell frequency in humans.,Reiser JB, Legoux F, Gras S, Trudel E, Chouquet A, Leger A, Le Gorrec M, Machillot P, Bonneville M, Saulquin X, Housset D J Immunol. 2014 Dec 15;193(12):5816-26. doi: 10.4049/jimmunol.1303084. Epub 2014 , Nov 12. PMID:25392532[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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See Also

References

  1. ↑ Seifert W, Kuhnisch J, Tuysuz B, Specker C, Brouwers A, Horn D. Mutations in the prostaglandin transporter encoding gene SLCO2A1 cause primary hypertrophic osteoarthropathy and isolated digital clubbing. Hum Mutat. 2012 Apr;33(4):660-4. doi: 10.1002/humu.22042. Epub 2012 Feb 24. PMID:22331663 doi:10.1002/humu.22042
  2. ↑ Zhang Z, Xia W, He J, Zhang Z, Ke Y, Yue H, Wang C, Zhang H, Gu J, Hu W, Fu W, Hu Y, Li M, Liu Y. Exome sequencing identifies SLCO2A1 mutations as a cause of primary hypertrophic osteoarthropathy. Am J Hum Genet. 2012 Jan 13;90(1):125-32. doi: 10.1016/j.ajhg.2011.11.019. Epub, 2011 Dec 22. PMID:22197487 doi:10.1016/j.ajhg.2011.11.019
  3. ↑ Diggle CP, Parry DA, Logan CV, Laissue P, Rivera C, Restrepo CM, Fonseca DJ, Morgan JE, Allanore Y, Fontenay M, Wipff J, Varret M, Gibault L, Dalantaeva N, Korbonits M, Zhou B, Yuan G, Harifi G, Cefle K, Palanduz S, Akoglu H, Zwijnenburg PJ, Lichtenbelt KD, Aubry-Rozier B, Superti-Furga A, Dallapiccola B, Accadia M, Brancati F, Sheridan EG, Taylor GR, Carr IM, Johnson CA, Markham AF, Bonthron DT. Prostaglandin transporter mutations cause pachydermoperiostosis with myelofibrosis. Hum Mutat. 2012 Aug;33(8):1175-81. doi: 10.1002/humu.22111. Epub 2012 May 29. PMID:22553128 doi:10.1002/humu.22111
  4. ↑ Busch J, Frank V, Bachmann N, Otsuka A, Oji V, Metze D, Shah K, Danda S, Watzer B, Traupe H, Bolz HJ, Kabashima K, Bergmann C. Mutations in the prostaglandin transporter SLCO2A1 cause primary hypertrophic osteoarthropathy with digital clubbing. J Invest Dermatol. 2012 Oct;132(10):2473-6. doi: 10.1038/jid.2012.146. Epub 2012 , Jun 14. PMID:22696055 doi:10.1038/jid.2012.146
  5. ↑ Reiser JB, Legoux F, Gras S, Trudel E, Chouquet A, Leger A, Le Gorrec M, Machillot P, Bonneville M, Saulquin X, Housset D. Analysis of relationships between peptide/MHC structural features and naive T cell frequency in humans. J Immunol. 2014 Dec 15;193(12):5816-26. doi: 10.4049/jimmunol.1303084. Epub 2014 , Nov 12. PMID:25392532 doi:http://dx.doi.org/10.4049/jimmunol.1303084

Contents


PDB ID 3mrr

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