8glh

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Crystal Structure of Human CD1b in Complex with Endogenous PC C40:5

Structural highlights

8glh is a 2 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 1.83Å
Ligands:3IV, 3IY, BMA, EDO, FUC, IOD, MAN, NA, NAG
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CD1B_HUMAN Antigen-presenting protein that binds self and non-self lipid and glycolipid antigens and presents them to T-cell receptors on natural killer T-cells.[1] [2]

Publication Abstract from PubMed

The CD1 system binds lipid antigens for display to T cells. Here, we solved lipidomes for the four human CD1 antigen-presenting molecules, providing a map of self-lipid display. Answering a basic question, the detection of >2,000 CD1-lipid complexes demonstrates broad presentation of self-sphingolipids and phospholipids. Whereas peptide antigens are chemically processed, many lipids are presented in an unaltered form. However, each type of CD1 protein differentially edits the self-lipidome to show distinct capture motifs based on lipid length and chemical composition, suggesting general antigen display mechanisms. For CD1a and CD1d, lipid size matches the CD1 cleft volume. CD1c cleft size is more variable, and CD1b is the outlier, where ligands and clefts show an extreme size mismatch that is explained by uniformly seating two small lipids in one cleft. Furthermore, the list of compounds that comprise the integrated CD1 lipidome supports the ongoing discovery of lipid blockers and antigens for T cells.

CD1 lipidomes reveal lipid-binding motifs and size-based antigen-display mechanisms.,Huang S, Shahine A, Cheng TY, Chen YL, Ng SW, Balaji GR, Farquhar R, Gras S, Hardman CS, Altman JD, Tahiri N, Minnaard AJ, Ogg GS, Mayfield JA, Rossjohn J, Moody DB Cell. 2023 Oct 12;186(21):4583-4596.e13. doi: 10.1016/j.cell.2023.08.022. Epub , 2023 Sep 18. PMID:37725977[3]

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

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Citations
2 reviews cite this structure
CD1a and skin T cells: a pathway for therapeutic intervention.
Ye et al. (2024)
1 more
3 other articles
No citations found

References

  1. ↑ Shamshiev A, Donda A, Prigozy TI, Mori L, Chigorno V, Benedict CA, Kappos L, Sonnino S, Kronenberg M, De Libero G. The alphabeta T cell response to self-glycolipids shows a novel mechanism of CD1b loading and a requirement for complex oligosaccharides. Immunity. 2000 Aug;13(2):255-64. PMID:10981968
  2. ↑ Winau F, Schwierzeck V, Hurwitz R, Remmel N, Sieling PA, Modlin RL, Porcelli SA, Brinkmann V, Sugita M, Sandhoff K, Kaufmann SH, Schaible UE. Saposin C is required for lipid presentation by human CD1b. Nat Immunol. 2004 Feb;5(2):169-74. Epub 2004 Jan 11. PMID:14716313 doi:10.1038/ni1035
  3. ↑ Huang S, Shahine A, Cheng TY, Chen YL, Ng SW, Balaji GR, Farquhar R, Gras S, Hardman CS, Altman JD, Tahiri N, Minnaard AJ, Ogg GS, Mayfield JA, Rossjohn J, Moody DB. CD1 lipidomes reveal lipid-binding motifs and size-based antigen-display mechanisms. Cell. 2023 Oct 12;186(21):4583-4596.e13. PMID:37725977 doi:10.1016/j.cell.2023.08.022

Contents


PDB ID 8glh

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OCA

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