+
データを開く
-
基本情報
登録情報 | データベース: EMDB / ID: EMD-0180 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
タイトル | Structure of the repeat unit in the network formed by CcmM and Rubisco from Synechococcus elongatus | |||||||||
![]() | Map after post-processing | |||||||||
![]() |
| |||||||||
![]() | CcmM / M58 / M35 / SSUL domain / ![]() ![]() ![]() | |||||||||
機能・相同性 | ![]() structural constituent of carboxysome shell / ![]() ![]() ![]() ![]() ![]() ![]() ![]() 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() ![]() ![]() | |||||||||
手法 | ![]() ![]() | |||||||||
![]() | Wang H / Yan X | |||||||||
![]() | ![]() タイトル: Rubisco condensate formation by CcmM in β-carboxysome biogenesis. 著者: H Wang / X Yan / H Aigner / A Bracher / N D Nguyen / W Y Hee / B M Long / G D Price / F U Hartl / M Hayer-Hartl / ![]() ![]() 要旨: Cells use compartmentalization of enzymes as a strategy to regulate metabolic pathways and increase their efficiency. The α- and β-carboxysomes of cyanobacteria contain ribulose-1,5-bisphosphate ...Cells use compartmentalization of enzymes as a strategy to regulate metabolic pathways and increase their efficiency. The α- and β-carboxysomes of cyanobacteria contain ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco)-a complex of eight large (RbcL) and eight small (RbcS) subunits-and carbonic anhydrase. As HCO can diffuse through the proteinaceous carboxysome shell but CO cannot, carbonic anhydrase generates high concentrations of CO for carbon fixation by Rubisco. The shell also prevents access to reducing agents, generating an oxidizing environment. The formation of β-carboxysomes involves the aggregation of Rubisco by the protein CcmM, which exists in two forms: full-length CcmM (M58 in Synechococcus elongatus PCC7942), which contains a carbonic anhydrase-like domain followed by three Rubisco small subunit-like (SSUL) modules connected by flexible linkers; and M35, which lacks the carbonic anhydrase-like domain. It has long been speculated that the SSUL modules interact with Rubisco by replacing RbcS. Here we have reconstituted the Rubisco-CcmM complex and solved its structure. Contrary to expectation, the SSUL modules do not replace RbcS, but bind close to the equatorial region of Rubisco between RbcL dimers, linking Rubisco molecules and inducing phase separation into a liquid-like matrix. Disulfide bond formation in SSUL increases the network flexibility and is required for carboxysome function in vivo. Notably, the formation of the liquid-like condensate of Rubisco is mediated by dynamic interactions with the SSUL domains, rather than by low-complexity sequences, which typically mediate liquid-liquid phase separation in eukaryotes. Indeed, within the pyrenoids of eukaryotic algae, the functional homologues of carboxysomes, Rubisco adopts a liquid-like state by interacting with the intrinsically disordered protein EPYC1. Understanding carboxysome biogenesis will be important for efforts to engineer CO-concentrating mechanisms in plants. | |||||||||
履歴 |
|
-
構造の表示
ムービー |
![]() |
---|---|
構造ビューア | EMマップ: ![]() ![]() ![]() |
添付画像 |
-
ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 5.4 MB | ![]() | |
---|---|---|---|---|
ヘッダ (付随情報) | ![]() ![]() | 15.7 KB 15.7 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 9.2 KB | 表示 | ![]() |
画像 | ![]() | 82.7 KB | ||
Filedesc metadata | ![]() | 6.6 KB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
-
リンク
EMDBのページ | ![]() ![]() |
---|---|
「今月の分子」の関連する項目 |
-
マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
注釈 | Map after post-processing | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 0.822 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
|
-添付データ
-
試料の構成要素
-全体 : Repeat unit in the CcmM-Rubisco network consisting of a SSUL doma...
全体 | 名称: Repeat unit in the CcmM-Rubisco network consisting of a SSUL domain from CcmM and each two RbcL and two RbcS chains from Rubisco![]() |
---|---|
要素 |
|
-超分子 #1: Repeat unit in the CcmM-Rubisco network consisting of a SSUL doma...
超分子 | 名称: Repeat unit in the CcmM-Rubisco network consisting of a SSUL domain from CcmM and each two RbcL and two RbcS chains from Rubisco タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all 詳細: CcmM contains a succession of three highly similar SSUL domains (residues 225-313, 340-428 and 455-539, respectively), which bind to cleft on the surface of Rubisco. Rubisco is a hexadecamer ...詳細: CcmM contains a succession of three highly similar SSUL domains (residues 225-313, 340-428 and 455-539, respectively), which bind to cleft on the surface of Rubisco. Rubisco is a hexadecamer of eight RbcL and eight RbcS subunits. The complex has D4 symmetry. The SSUL-RbcL2-RbcS2 repeat units can have one of two orientations (up or down). Thus Rubisco complexes saturated with SSUL domains can have four different configurations (uuuu, uuud, uudd, udud). In reality, some SSUL binding sites are probably left unoccupied. The network is formed by flexible linkers connecting the SSUL domains in CcmM, which then interlink Rubisco hexadecamers. |
---|---|
由来(天然) | 生物種: ![]() ![]() Organelle: Carboxysome |
-分子 #1: Carbon dioxide concentrating mechanism protein CcmM
分子 | 名称: Carbon dioxide concentrating mechanism protein CcmM / タイプ: protein_or_peptide / ID: 1 / コピー数: 1 / 光学異性体: LEVO |
---|---|
由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 10.550686 KDa |
組換発現 | 生物種: ![]() ![]() ![]() |
配列 | 文字列: SEFLSSEVIT QVRSLLNQGY RIGTEHADKR RFRTSSWQPC APIQSTNERQ VLSELENCLS EHEGEYVRLL GIDTNTRSRV FEALIQRPD GSV UniProtKB: Carboxysome assembly protein CcmM |
-分子 #2: Ribulose bisphosphate carboxylase large chain
分子 | 名称: Ribulose bisphosphate carboxylase large chain / タイプ: protein_or_peptide / ID: 2 / コピー数: 2 / 光学異性体: LEVO EC番号: ![]() |
---|---|
由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 52.516605 KDa |
組換発現 | 生物種: ![]() ![]() ![]() |
配列 | 文字列: MPKTQSAAGY KAGVKDYKLT YYTPDYTPKD TDLLAAFRFS PQPGVPADEA GAAIAAESST GTWTTVWTDL LTDMDRYKGK CYHIEPVQG EENSYFAFIA YPLDLFEEGS VTNILTSIVG NVFGFKAIRS LRLEDIRFPV ALVKTFQGPP HGIQVERDLL N KYGRPMLG ...文字列: MPKTQSAAGY KAGVKDYKLT YYTPDYTPKD TDLLAAFRFS PQPGVPADEA GAAIAAESST GTWTTVWTDL LTDMDRYKGK CYHIEPVQG EENSYFAFIA YPLDLFEEGS VTNILTSIVG NVFGFKAIRS LRLEDIRFPV ALVKTFQGPP HGIQVERDLL N KYGRPMLG CTIKPKLGLS AKNYGRAVYE CLRGGLDFTK DDENINSQPF QRWRDRFLFV ADAIHKSQAE TGEIKGHYLN VT APTCEEM MKRAEFAKEL GMPIIMHDFL TAGFTANTTL AKWCRDNGVL LHIHRAMHAV IDRQRNHGIH FRVLAKCLRL SGG DHLHSG TVVGKLEGDK ASTLGFVDLM REDHIEADRS RGVFFTQDWA SMPGVLPVAS GGIHVWHMPA LVEIFGDDSV LQFG GGTLG HPWGNAPGAT ANRVALEACV QARNEGRDLY REGGDILREA GKWSPELAAA LDLWKEIKFE FETMDKL UniProtKB: Ribulose bisphosphate carboxylase large chain |
-分子 #3: Ribulose 1,5-bisphosphate carboxylase small subunit
分子 | 名称: Ribulose 1,5-bisphosphate carboxylase small subunit / タイプ: protein_or_peptide / ID: 3 / コピー数: 2 / 光学異性体: LEVO EC番号: ![]() |
---|---|
由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 13.349196 KDa |
組換発現 | 生物種: ![]() ![]() ![]() |
配列 | 文字列: MSMKTLPKER RFETFSYLPP LSDRQIAAQI EYMIEQGFHP LIEFNEHSNP EEFYWTMWKL PLFDCKSPQQ VLDEVRECRS EYGDCYIRV AGFDNIKQCQ TVSFIVHRPG RY UniProtKB: ![]() |
-実験情報
-構造解析
手法 | ![]() |
---|---|
![]() | ![]() |
試料の集合状態 | particle |
-
試料調製
濃度 | 5 mg/mL | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
緩衝液 | pH: 8 構成要素:
詳細: Solutions were made fresh | |||||||||||||||
グリッド | モデル: Quantifoil R2/1 / 材質: COPPER / メッシュ: 300 / 支持フィルム - 材質: CARBON / 支持フィルム - トポロジー: HOLEY / 前処理 - タイプ: PLASMA CLEANING / 前処理 - 時間: 30 sec. / 前処理 - 雰囲気: AIR / 前処理 - 気圧: 101.325 kPa | |||||||||||||||
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 90 % / チャンバー内温度: 298 K / 装置: FEI VITROBOT MARK IV / 詳細: blot for 3 seconds before plunging. | |||||||||||||||
詳細 | This sample contained 10 nm gold beads and was not monodisperse |
-
電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
---|---|
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD![]() |
撮影 | フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) 平均露光時間: 0.15 sec. / 平均電子線量: 1.05 e/Å2 |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
-
画像解析
-原子モデル構築 1
詳細 | The cryoEM density for the repeat unit was masked by Refmac to the coordinates and converted into structure factors by Refmac. The model was adjusted with coot. This model was submitted to restrained refinement with Refmac against the structure factors. |
---|---|
精密化 | 空間: RECIPROCAL / プロトコル: AB INITIO MODEL 当てはまり具合の基準: Average Fourier shell correlation |
得られたモデル | ![]() PDB-6hbc: |