CD44 directs membrane-type 1 matrix metalloproteinase to lamellipodia by associating with its hemopexin-like domain

Membrane‐type 1 matrix metalloproteinase (MT1‐ MMP) localizes at the front of migrating cells and degrades the extracellular matrix barrier during cancer invasion. However, it is poorly understood how the polarized distribution of MT1‐MMP at the migration front is regulated. Here, we demonstrate tha...

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Veröffentlicht in:The EMBO journal 2002-08, Vol.21 (15), p.3949-3959
Hauptverfasser: Mori, Hidetoshi, Tomari, Taizo, Koshikawa, Naohiko, Kajita, Masahiro, Itoh, Yoshifumi, Sato, Hiroshi, Tojo, Hideaki, Yana, Ikuo, Seiki, Motoharu
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container_issue 15
container_start_page 3949
container_title The EMBO journal
container_volume 21
creator Mori, Hidetoshi
Tomari, Taizo
Koshikawa, Naohiko
Kajita, Masahiro
Itoh, Yoshifumi
Sato, Hiroshi
Tojo, Hideaki
Yana, Ikuo
Seiki, Motoharu
description Membrane‐type 1 matrix metalloproteinase (MT1‐ MMP) localizes at the front of migrating cells and degrades the extracellular matrix barrier during cancer invasion. However, it is poorly understood how the polarized distribution of MT1‐MMP at the migration front is regulated. Here, we demonstrate that MT1‐MMP forms a complex with CD44H via the hemopexin‐like (PEX) domain. A mutant MT1‐MMP lacking the PEX domain failed to bind CD44H and did not localize at the lamellipodia. The cytoplasmic tail of CD44H, which comprises interfaces that associate with the actin cytoskeleton, was important for its localization at lamellipodia. Overexpression of a CD44H mutant lacking the cytoplasmic tail also prevented MT1‐MMP from localizing at the lamellipodia. Modulation of F‐actin with cytochalasin D revealed that both CD44H and MT1‐MMP co‐localize closely with the actin cytoskeleton, dependent on the cytoplasmic tail of CD44H. Thus, CD44H appears to act as a linker that connects MT1‐MMP to the actin cytoskeleton and to play a role in directing MT1‐MMP to the migration front. The PEX domain of MT1‐MMP was indispensable in promoting cell migration and CD44H shedding.
doi_str_mv 10.1093/emboj/cdf411
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subjects actin
Actins - analysis
Animals
CD44
Cell Membrane - metabolism
Cell Movement - physiology
Cercopithecus aethiops
CHO Cells - cytology
Cricetinae
Cricetulus
Cytoskeleton - metabolism
Cytoskeleton - ultrastructure
EMBO05
Fibroblasts - cytology
Hemopexin - chemistry
Humans
Hyaluronan Receptors - chemistry
Hyaluronan Receptors - genetics
Hyaluronan Receptors - physiology
invasion
lamellipodium
Macromolecular Substances
Matrix Metalloproteinases, Membrane-Associated
Metalloendopeptidases - metabolism
MT1-MMP
Protein Interaction Mapping
Protein Structure, Tertiary
Protein Transport
Pseudopodia - metabolism
Recombinant Fusion Proteins - physiology
Sequence Deletion
Structure-Activity Relationship
Transfection
Tumor Cells, Cultured - cytology
title CD44 directs membrane-type 1 matrix metalloproteinase to lamellipodia by associating with its hemopexin-like domain
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