Objective
MHC class I molecules present peptides from intracellular antigens to the immune system. The peptides are produced by the intracellular proteasome and further trimmed and destroyed by various unrelated peptidases. Only a fraction (0.01%) of these peptides escape peptidase destruction through import into the ER by the peptide transporter TAP before they can bind to resident MHC class I molecules for presentation at the plasma membrane. Since the peptidase activity plays an important role in the selection of peptides for presentation, we propose to study these using microinjection of internally quenched peptides and inhibitors, to measure peptidase activity in living cells.
I aim to: 1. Test with a large set of internally quenched peptides the subspecializati on of intracellular peptidases for substrate (peptide) length and sequence. 2. Identify the respective peptidases responsible for the detected subspecializations. Chemical inhibitors and RNAi for TOP, BH and TPPII have been defined and their effects on pep tide destruction will be measured. 3. Test the effect of the peptidases on the petpidome as presented by MHC class I molecules. Peptidases will be inhibited and the resulting peptidome will be assayed by comparative mass spectrometry using differently labelled amino acids. 4. Test whether different cells employ different peptidase activities. The Neefjes lab has indications that dendritic cells change their peptidase activity and I will study this and the effect of various activation stages of these cells in more detail. 5. Combine these findings with the results on manipulation for peptidase activity to determine the effect of peptidase activity on the outcome of MHC class I response in dendritic cells.
The experiments should reveal the role of cytosolic peptidase activities in antigen presentation by MHC class I molecules and add information to better predict the MHC class I peptidome on the basis of the primary sequence of the antigen.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- medical and health sciences clinical medicine oncology skin cancer melanoma
- natural sciences biological sciences biochemistry biomolecules proteins
- medical and health sciences basic medicine immunology
- natural sciences chemical sciences organic chemistry amines
- natural sciences chemical sciences analytical chemistry mass spectrometry
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
FP6-2005-MOBILITY-5
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Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
AMSTERDAM
Netherlands
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.