endopeptidase La / ATP-dependent peptidase activity / protein quality control for misfolded or incompletely synthesized proteins / cellular response to heat / sequence-specific DNA binding / serine-type endopeptidase activity / ATP hydrolysis activity / ATP binding / identical protein binding / 細胞質 類似検索 - 分子機能
Lon protease, bacterial / Lon protease, bacterial/eukaryotic-type / Peptidase S16, active site / ATP-dependent serine proteases, lon family, serine active site. / Lon proteolytic domain profile. / Peptidase S16, Lon proteolytic domain / Lon protease / Lon protease (S16) C-terminal proteolytic domain / Lon protease, N-terminal domain superfamily / Lon N-terminal domain profile. ...Lon protease, bacterial / Lon protease, bacterial/eukaryotic-type / Peptidase S16, active site / ATP-dependent serine proteases, lon family, serine active site. / Lon proteolytic domain profile. / Peptidase S16, Lon proteolytic domain / Lon protease / Lon protease (S16) C-terminal proteolytic domain / Lon protease, N-terminal domain superfamily / Lon N-terminal domain profile. / Lon protease, N-terminal domain / ATP-dependent protease La (LON) substrate-binding domain / Found in ATP-dependent protease La (LON) / PUA-like superfamily / ATPase family associated with various cellular activities (AAA) / ATPase, AAA-type, core / Ribosomal protein S5 domain 2-type fold, subgroup / Ribosomal protein S5 domain 2-type fold / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
ジャーナル: Sci Adv / 年: 2021 タイトル: Complete three-dimensional structures of the Lon protease translocating a protein substrate. 著者: Shanshan Li / Kan-Yen Hsieh / Chiao-I Kuo / Szu-Hui Lee / Grigore D Pintilie / Kaiming Zhang / Chung-I Chang / 要旨: Lon is an evolutionarily conserved proteolytic machine carrying out a wide spectrum of biological activities by degrading misfolded damaged proteins and specific cellular substrates. Lon contains a ...Lon is an evolutionarily conserved proteolytic machine carrying out a wide spectrum of biological activities by degrading misfolded damaged proteins and specific cellular substrates. Lon contains a large N-terminal domain and forms a hexameric core of fused adenosine triphosphatase and protease domains. Here, we report two complete structures of Lon engaging a substrate, determined by cryo–electron microscopy to 2.4-angstrom resolution. These structures show a multilayered architecture featuring a tensegrity triangle complex, uniquely constructed by six long N-terminal helices. The interlocked helix triangle is assembled on the top of the hexameric core to spread a web of six globular substrate-binding domains. It serves as a multipurpose platform that controls the access of substrates to the AAA+ ring, provides a ruler-based mechanism for substrate selection, and acts as a pulley device to facilitate unfolding of the translocated substrate. This work provides a complete framework for understanding the structural mechanisms of Lon.
Authors know the sequence of chain S (UNP P02662) but don't know how the coordinates align with the ...Authors know the sequence of chain S (UNP P02662) but don't know how the coordinates align with the sequence. P02662 sequence is MKLLILTCLV AVALARPKHP IKHQGLPQEV LNENLLRFFV APFPEVFGKE KVNELSKDIG SESTEDQAME DIKQMEAESI SSSEEIVPNS VEQKHIQKED VPSERYLGYL EQLLRLKKYK VPQLEIVPNS AEERLHSMKE GIHAQQKEPM IGVNQELAYF YPELFRQFYQ LDAYPSGAWY YVPLGTQYTD APSFSDIPNP IGSENSEKTT MPLW
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実験情報
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実験
実験
手法: 電子顕微鏡法
EM実験
試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法
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試料調製
構成要素
ID
名称
タイプ
Entity ID
Parent-ID
由来
1
A complete three-dimensional structure of the Lon protease translocating a protein substrate (conformation 1)
COMPLEX
#1-#2
0
MULTIPLESOURCES
2
LonproteaseLon protease family
COMPLEX
#1
1
RECOMBINANT
3
Alpha-S1-casein
COMPLEX
#2
1
NATURAL
分子量
値: 0.37 MDa / 実験値: YES
由来(天然)
ID
Entity assembly-ID
生物種
Ncbi tax-ID
2
1
Meiothermus taiwanensis (バクテリア)
172827
3
2
Bos taurus (ウシ)
9913
由来(組換発現)
生物種: Escherichia coli (大腸菌)
緩衝液
pH: 8
試料
濃度: 0.5 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES