Legionella pneumophila effector WipA, a bacterial PPP protein phosphatase with PTP activity
Abstract The gram-negative bacterium Legionella pneumophila invades human’s lung and causes Legionnaires’ disease. To benefit its survival and replication in cellular milieu, L. pneumophila secrets at least 330 effector proteins into host cells. We found that the effector WipA has the protein tyrosi...
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| Published in | Acta biochimica et biophysica Sinica Vol. 50; no. 6; pp. 547 - 554 |
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| Main Authors | , , , , , , , |
| Format | Journal Article |
| Language | English |
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China
Oxford University Press
01.06.2018
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| Abstract | Abstract
The gram-negative bacterium Legionella pneumophila invades human’s lung and causes Legionnaires’ disease. To benefit its survival and replication in cellular milieu, L. pneumophila secrets at least 330 effector proteins into host cells. We found that the effector WipA has the protein tyrosine phosphatase (PTP) activity but does not depend on the classical CX5R motif for activity, suggesting that WipA is an unconventional PTP. Meanwhile, the presence of three other highly conserved motifs typically seen in protein serine/threonine phosphatases and the poor inhibition of WipA activity by okadaic acid led us to propose that WipA is a bacterial protein phosphatase. In addition, the determination of the 2.55-Å crystal structure of WipA revealed that WipA resembles cold-active protein tyrosine phosphatase (CAPTPase), and therefore very likely shares the same catalytic mechanism. |
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| AbstractList | Abstract
The gram-negative bacterium Legionella pneumophila invades human’s lung and causes Legionnaires’ disease. To benefit its survival and replication in cellular milieu, L. pneumophila secrets at least 330 effector proteins into host cells. We found that the effector WipA has the protein tyrosine phosphatase (PTP) activity but does not depend on the classical CX5R motif for activity, suggesting that WipA is an unconventional PTP. Meanwhile, the presence of three other highly conserved motifs typically seen in protein serine/threonine phosphatases and the poor inhibition of WipA activity by okadaic acid led us to propose that WipA is a bacterial protein phosphatase. In addition, the determination of the 2.55-Å crystal structure of WipA revealed that WipA resembles cold-active protein tyrosine phosphatase (CAPTPase), and therefore very likely shares the same catalytic mechanism. The gram-negative bacterium Legionella pneumophila invades human's lung and causes Legionnaires' disease. To benefit its survival and replication in cellular milieu, L. pneumophila secrets at least 330 effector proteins into host cells. We found that the effector WipA has the protein tyrosine phosphatase (PTP) activity but does not depend on the classical CX5R motif for activity, suggesting that WipA is an unconventional PTP. Meanwhile, the presence of three other highly conserved motifs typically seen in protein serine/threonine phosphatases and the poor inhibition of WipA activity by okadaic acid led us to propose that WipA is a bacterial protein phosphatase. In addition, the determination of the 2.55-Å crystal structure of WipA revealed that WipA resembles cold-active protein tyrosine phosphatase (CAPTPase), and therefore very likely shares the same catalytic mechanism. The gram-negative bacterium Legionella pneumophila invades human's lung and causes Legionnaires' disease. To benefit its survival and replication in cellular milieu, L. pneumophila secrets at least 330 effector proteins into host cells. We found that the effector WipA has the protein tyrosine phosphatase (PTP) activity but does not depend on the classical CX5R motif for activity, suggesting that WipA is an unconventional PTP. Meanwhile, the presence of three other highly conserved motifs typically seen in protein serine/threonine phosphatases and the poor inhibition of WipA activity by okadaic acid led us to propose that WipA is a bacterial protein phosphatase. In addition, the determination of the 2.55-Å crystal structure of WipA revealed that WipA resembles cold-active protein tyrosine phosphatase (CAPTPase), and therefore very likely shares the same catalytic mechanism.The gram-negative bacterium Legionella pneumophila invades human's lung and causes Legionnaires' disease. To benefit its survival and replication in cellular milieu, L. pneumophila secrets at least 330 effector proteins into host cells. We found that the effector WipA has the protein tyrosine phosphatase (PTP) activity but does not depend on the classical CX5R motif for activity, suggesting that WipA is an unconventional PTP. Meanwhile, the presence of three other highly conserved motifs typically seen in protein serine/threonine phosphatases and the poor inhibition of WipA activity by okadaic acid led us to propose that WipA is a bacterial protein phosphatase. In addition, the determination of the 2.55-Å crystal structure of WipA revealed that WipA resembles cold-active protein tyrosine phosphatase (CAPTPase), and therefore very likely shares the same catalytic mechanism. |
| Author | Jia, Qian Lin, Yun Lu, Yongjun Xie, Wei He, Lei Gou, Xuejing Chen, Dongni Shen, Dong |
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| Copyright | The Author(s) 2018. Published by Oxford University Press on behalf of the Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com 2018 |
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| Keywords | crystal structure effector WipA protein tyrosine phosphatase phosphoprotein phosphatase |
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The gram-negative bacterium Legionella pneumophila invades human’s lung and causes Legionnaires’ disease. To benefit its survival and replication in... The gram-negative bacterium Legionella pneumophila invades human's lung and causes Legionnaires' disease. To benefit its survival and replication in cellular... |
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| Title | Legionella pneumophila effector WipA, a bacterial PPP protein phosphatase with PTP activity |
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