1. Structural Biology and Molecular Biophysics
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An unexpected INAD PDZ tandem-mediated PLCβ binding in Drosophila photo receptors

  1. Fei Ye
  2. Yuxin Huang
  3. Jianchao Li
  4. Yuqian Ma
  5. Chensu Xie
  6. Zexu Liu
  7. Xiaoying Deng
  8. Jun Wan
  9. Tian Xue
  10. Wei Liu  Is a corresponding author
  11. Mingjie Zhang  Is a corresponding author
  1. Hong Kong University of Science and Technology, Hong Kong
  2. Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, China
  3. University of Science and Technology of China, China
Research Article
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Cite this article as: eLife 2018;7:e41848 doi: 10.7554/eLife.41848

Abstract

INAD assembles key enzymes of Drosophila compound eye photo-transduction pathway into a supramolecular complex, supporting efficient and fast light signaling. However, the molecular mechanism governing the interaction between INAD and NORPA (phospholipase Cβ, PLCβ), a key step for the fast kinetics of the light signaling, is not known. Here, we show that the NORPA C-terminal coiled-coil domain and PDZ-binding motif (CC-PBM) synergistically bind to INAD PDZ45 tandem with an unexpected mode and unprecedentedly high affinity. Guided by the INAD/NORPA complex structure, we discover that INADL is likely a mammalian counterpart of INAD. The INADL PDZ89 tandem specifically binds to PLCβ4 with a strikingly similar mode to that of the INAD/NORPA complex as revealed by the structure of the INADL PDZ89/PLCβ4 CC-PBM complex. Therefore, our study suggests that the highly specific PDZ tandem/PLCβ interactions are an evolutionarily conserved mechanism in PLCβ signaling of the animal kingdom.

Data availability

Diffraction data have been deposited at PDB under the accession numbers 6IRB, 6IRC, 6IRD, and 6IRE.

The following data sets were generated

Article and author information

Author details

  1. Fei Ye

    Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Hong Kong, Hong Kong
    Competing interests
    No competing interests declared.
  2. Yuxin Huang

    Biomedical Research Institute, Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
    Competing interests
    No competing interests declared.
  3. Jianchao Li

    Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Hong Kong, Hong Kong
    Competing interests
    No competing interests declared.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-8921-1626
  4. Yuqian Ma

    School of Life Sciences, University of Science and Technology of China, Hefei, China
    Competing interests
    No competing interests declared.
  5. Chensu Xie

    Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Hong Kong, Hong Kong
    Competing interests
    No competing interests declared.
  6. Zexu Liu

    Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Hong Kong, Hong Kong
    Competing interests
    No competing interests declared.
  7. Xiaoying Deng

    Biomedical Research Institute, Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
    Competing interests
    No competing interests declared.
  8. Jun Wan

    Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Hong Kong, Hong Kong
    Competing interests
    No competing interests declared.
  9. Tian Xue

    School of Life Sciences, University of Science and Technology of China, Hefei, China
    Competing interests
    No competing interests declared.
  10. Wei Liu

    Biomedical Research Institute, Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
    For correspondence
    liuwei@sphmc.org
    Competing interests
    No competing interests declared.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0001-8250-2562
  11. Mingjie Zhang

    Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Hong Kong, Hong Kong
    For correspondence
    mzhang@ust.hk
    Competing interests
    Mingjie Zhang, Reviewing editor, eLife.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0001-9404-0190

Funding

Minister of Science and Technology of China (2014CB910204)

  • Mingjie Zhang

Research Grant Council of Hong Kong (C6004-17)

  • Mingjie Zhang

Shenzhen Basic Research Grant (JCYJ20170411090807530)

  • Wei Liu

Shenzhen Basic Research Grant (JCYJ20160427185712266)

  • Wei Liu

National Natural Science Foundation of China (31670765)

  • Wei Liu

National Natural Science Foundation of China (31870746)

  • Wei Liu

Chinese Academy of Sciences Key Project (XDPB10)

  • Tian Xue

Chinese Academy of Sciences Key Project (XDB02010000)

  • Tian Xue

Research Grant Council of Hong Kong (AoE-M09-12)

  • Mingjie Zhang

National Key R&D Program of China (2016YFA0501903)

  • Mingjie Zhang

Natural Science Foundation of Guangdong Province (2016A030312016)

  • Mingjie Zhang

Shenzhen Basic Research Grant (JCYJ20160229153100269)

  • Wei Liu

National Natural Science Foundation of China (81790644)

  • Tian Xue

Chinese Academy of Sciences Key Project (XDA16020603)

  • Tian Xue

National Key Basic Research Program of China (2016YFA0400900)

  • Tian Xue

GRF grant from RGC of Hong Kong (16104518)

  • Fei Ye

The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.

Reviewing Editor

  1. Axel T Brunger, Stanford University, United States

Publication history

  1. Received: September 8, 2018
  2. Accepted: December 8, 2018
  3. Accepted Manuscript published: December 10, 2018 (version 1)
  4. Version of Record published: December 19, 2018 (version 2)

Copyright

© 2018, Ye et al.

This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.

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