Structural separation of different extracellular activities in aminoacyl-tRNA synthetase-interacting multi-functional protein, p43/AIMP1

Jung Min Han, Sang Gyu Park, Yeonsook Lee, Sunghoon Kim

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

AIMP1 (previously known as p43) is first found as a factor associated with a macromolecular tRNA synthetase complex. However, it is also secreted and acts on diverse target cells such as endothelial cells, macrophages, and fibroblasts to control angiogenesis, inflammation, and dermal regeneration, respectively. We previously showed that AIMP1 induces the death of endothelial cell but proliferation of fibroblasts and activates macrophages. In this work, we found that elastase 2-cleaved AIMP1 retained its pro-apoptotic activity to endothelial cells but lost the growth-stimulatory activity to fibroblasts. To determine the functional domains responsible for each activity, we generated several deletion fragments of AIMP1 and compared the activities to the target cells. AIMP1 promoted endothelial cell death and caspase-3 activation through its 101-114 amino acid region, fibroblast proliferation through its 6-46 amino acid region, and endothelial migration through its 114-192 amino acid region as revealed by deletion mapping. Thus, this work revealed that AIMP1 uses different regions for its diverse extracellular activities.

Original languageEnglish
Pages (from-to)113-118
Number of pages6
JournalBiochemical and Biophysical Research Communications
Volume342
Issue number1
DOIs
Publication statusPublished - 2006 Mar 31

Fingerprint

Amino Acyl-tRNA Synthetases
Endothelial cells
Fibroblasts
Endothelial Cells
Macrophages
Amino Acids
Proteins
Cell proliferation
Cell death
Caspase 3
Regeneration
Cell Death
Chemical activation
Cell Proliferation
Inflammation
Skin
Growth

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Biophysics
  • Molecular Biology

Cite this

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abstract = "AIMP1 (previously known as p43) is first found as a factor associated with a macromolecular tRNA synthetase complex. However, it is also secreted and acts on diverse target cells such as endothelial cells, macrophages, and fibroblasts to control angiogenesis, inflammation, and dermal regeneration, respectively. We previously showed that AIMP1 induces the death of endothelial cell but proliferation of fibroblasts and activates macrophages. In this work, we found that elastase 2-cleaved AIMP1 retained its pro-apoptotic activity to endothelial cells but lost the growth-stimulatory activity to fibroblasts. To determine the functional domains responsible for each activity, we generated several deletion fragments of AIMP1 and compared the activities to the target cells. AIMP1 promoted endothelial cell death and caspase-3 activation through its 101-114 amino acid region, fibroblast proliferation through its 6-46 amino acid region, and endothelial migration through its 114-192 amino acid region as revealed by deletion mapping. Thus, this work revealed that AIMP1 uses different regions for its diverse extracellular activities.",
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Structural separation of different extracellular activities in aminoacyl-tRNA synthetase-interacting multi-functional protein, p43/AIMP1. / Han, Jung Min; Park, Sang Gyu; Lee, Yeonsook; Kim, Sunghoon.

In: Biochemical and Biophysical Research Communications, Vol. 342, No. 1, 31.03.2006, p. 113-118.

Research output: Contribution to journalArticle

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