Ministry of Education, Culture, Sports, Science and Technology (Japan)
22K07063
日本
引用
ジャーナル: PLoS Pathog / 年: 2025 タイトル: Dynamics of the adhesion complex of the human pathogens Mycoplasma pneumoniae and Mycoplasma genitalium. 著者: David Vizarraga / Akihiro Kawamoto / Marina Marcos-Silva / Jesús Martín / Fumiaki Makino / Tomoko Miyata / Jorge Roel-Touris / Enrique Marcos / Oscar Q Pich / David Aparicio / Ignacio Fita ...著者: David Vizarraga / Akihiro Kawamoto / Marina Marcos-Silva / Jesús Martín / Fumiaki Makino / Tomoko Miyata / Jorge Roel-Touris / Enrique Marcos / Oscar Q Pich / David Aparicio / Ignacio Fita / Makoto Miyata / Jaume Piñol / Keiichi Namba / Tsuyoshi Kenri / 要旨: Mycoplasma pneumoniae and Mycoplasma genitalium are bacterial wall-less human pathogens and the causative agents of respiratory and reproductive tract infections. Infectivity, gliding motility and ...Mycoplasma pneumoniae and Mycoplasma genitalium are bacterial wall-less human pathogens and the causative agents of respiratory and reproductive tract infections. Infectivity, gliding motility and adhesion of these mycoplasmas to host cells are mediated by orthologous adhesin proteins forming a transmembrane adhesion complex that binds to sialylated oligosaccharides human cell ligands. Here we report the cryo-EM structure of M. pneumoniae P1 adhesin bound to the Fab fragment of monoclonal antibody P1/MCA4, which stops gliding and induces detachment of motile cells. The epitope of P1/MCA4 involves residues only from the small C-domain of P1. This epitope is accessible to antibodies only in the "closed conformation" of the adhesion complex and is not accessible in the "open" conformation, when the adhesion complex is ready for attachment to sialylated oligosaccharides. Polyclonal antibodies generated against the large N-domain of P1 or against the whole ectodomain of P40/P90 have little or no effects on adhesion or motility. Moreover, mutations in the highly conserved Engelman motifs found in the transmembrane helix of M. genitalium P110 adhesin also alter adhesion and motility. These results show that antibodies directed to the C-domain of P1 hinder the large conformational rearrangements in this domain required to alternate between the "open" and "closed" conformations of the adhesion complex. Since transition between both conformations is essential to complete the attachment/detachment cycle of the adhesion complex, interfering with the gliding of mycoplasma cells and providing a new potential target to confront M. pneumoniae and M. genitalium infections.
履歴
登録
2024年1月12日
登録サイト: PDBE / 処理サイト: PDBE
改定 1.0
2025年3月5日
Provider: repository / タイプ: Initial release
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2025年3月5日
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2025年3月5日
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2025年3月5日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Database references / Experimental summary Data content type: EM metadata / EM metadata ...EM metadata / EM metadata / EM metadata / EM metadata カテゴリ: citation / citation_author ...citation / citation_author / em_admin / em_author_list Data content type: EM metadata / EM metadata ...EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update / _em_author_list.author
Mycoplasma pneumoniae adhesin P1 complexed with the anti-adhesive Fab fragment.
COMPLEX
Fab fragment from a monoclonal antibody that binds to the C-terminal domain of the P1 adhesin of Mycoplasma pneumoniae, interfering with its adhesion to sialic acids.
#1-#3
0
MULTIPLESOURCES
2
AdhesinP1
COMPLEX
#1
1
RECOMBINANT
3
Anti-adhesive Fab fragment
COMPLEX
#2-#3
1
RECOMBINANT
分子量
値: 0.20 MDa / 実験値: YES
由来(天然)
ID
Entity assembly-ID
生物種
Ncbi tax-ID
2
2
Mycoplasmoides pneumoniae M129 (バクテリア)
272634
3
3
Mus musculus (ハツカネズミ)
10090
由来(組換発現)
ID
Entity assembly-ID
生物種
Ncbi tax-ID
2
2
Escherichia coli BL21(DE3) (大腸菌)
469008
3
3
Escherichia coli (大腸菌)
562
緩衝液
pH: 7.4
試料
包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES
急速凍結
凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277 K
-
電子顕微鏡撮影
顕微鏡
モデル: JEOL CRYO ARM 300
電子銃
電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: OTHER