What question did this study set out to answer?

Determine the structural basis by which tracheal cytotoxin induces heterodimerization of Drosophila peptidoglycan recognition proteins LCa and LCx to trigger innate immune signaling.

March 23, 2006Science

Structure of Tracheal Cytotoxin in Complex with a Heterodimeric Pattern-Recognition Receptor

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Authors

CCChung‐I ChangNational Taiwan University YCYogarany ChelliahThe University of Texas Southwestern Medical Center DBDominika BorekNorthwestern University

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Implication

Structural analysis reveals how tracheal cytotoxin bridges PGRP-LCa and PGRP-LCx in fruit flies, highlighting key mechanisms of innate bacterial sensing.

Key Points

Determine the structural basis by which tracheal cytotoxin induces heterodimerization of Drosophila peptidoglycan recognition proteins LCa and LCx to trigger innate immune signaling.
Determined the crystal structure of tracheal cytotoxin complexed with the ectodomains of Drosophila PGRP-LCa and PGRP-LCx at 2.1 Å resolution.
Demonstrated that tracheal cytotoxin is bound and presented by the PGRP-LCx ectodomain for recognition by PGRP-LCa, which lacks a canonical peptidoglycan-docking groove.
Showed that an anhydro-containing disaccharide bridges the two receptor ectodomains, while diaminopimelic acid acts as the critical specificity determinant for receptor engagement.

Cite This Study

Chang et al. (2006) studied this question.

synapsesocial.com/papers/6aa9242f6dc8754dbe62e07d https://doi.org/10.1126/science.1123056

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Implication

Structural analysis reveals how tracheal cytotoxin bridges PGRP-LCa and PGRP-LCx in fruit flies, highlighting key mechanisms of innate bacterial sensing.

Structure of Tracheal Cytotoxin in Complex with a Heterodimeric Pattern-Recognition Receptor

Discussion

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Implication

Key Points

Cite This Study

Structure of Tracheal Cytotoxin in Complex with a Heterodimeric Pattern-Recognition Receptor

Discussion

Member takes

Implication

Key Points

Cite This Study

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