- PDB-1zy6: Membrane-bound dimer structure of Protegrin-1 (PG-1), a beta-Hair... -
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IDまたはキーワード:
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基本情報
登録情報
データベース: PDB / ID: 1zy6
タイトル
Membrane-bound dimer structure of Protegrin-1 (PG-1), a beta-Hairpin Antimicrobial Peptide in Lipid Bilayers from Rotational-Echo Double-Resonance Solid-State NMR
要素
Protegrin 1
キーワード
ANTIBIOTIC / beta-hairpin / solid state NMR
機能・相同性
機能・相同性情報
lipopolysaccharide binding / antimicrobial humoral immune response mediated by antimicrobial peptide / defense response to Gram-negative bacterium / defense response to Gram-positive bacterium / innate immune response / extracellular space 類似検索 - 分子機能
分子量: 2164.679 Da / 分子数: 2 / 由来タイプ: 合成 / 詳細: BIOLOGICAL SEQUENCE WITH AMIDATED C-TERMINUS / 参照: UniProt: P32194
Has protein modification
Y
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実験情報
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実験
実験
手法: 個体NMR
NMR実験
Conditions-ID
Experiment-ID
Solution-ID
タイプ
1
1
1
rotational-echo double resonance (REDOR) NMR technique, which measures distances between heteronuclear spins
1
2
2
rotational-echo double resonance (REDOR) NMR technique, which measures distances between heteronuclear spins
NMR実験の詳細
Text: Solid State NMR was performed at 400.49 MHz for 1H, 376.8 MHz for 19F, 100.72 MHz for 13C, and 40.58 MHz for 15N. The 15N{13C} and 13C{1H} REDOR experiments were carried out on a 1H/13C/15N ...Text: Solid State NMR was performed at 400.49 MHz for 1H, 376.8 MHz for 19F, 100.72 MHz for 13C, and 40.58 MHz for 15N. The 15N{13C} and 13C{1H} REDOR experiments were carried out on a 1H/13C/15N triple resonance MAS probe. Spinning speeds were regulated to 3 Hz using a pneumatic control unit. 13C and 15N chemical shifts were referenced externally to the 13C signal of alpha-Gly at 176.4 ppm on the TMS scale and the 15N signal of N-acetyl-valine at 122 ppm, respectively. The 13C{19F} REDOR experiments, where the nucleus in the bracket is the unobserved dephasing spin, was conducted on a 4-mm magic-angle spinning (MAS) probe equipped with a Bruker HFX unit, which allows simultaneous tuning of 1H and 19F on the 1H channel.
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試料調製
詳細
Solution-ID
内容
溶媒系
1
1:1 molar mixture of [13C-Cys15] PG-1 and [15N-Cys15] PG-1
POPC bilayers at a peptide-lipid molar ratio of 1:20
2
[4-19F-Phe12, 13C-Val16] PG-1
POPC bilayers at a peptide-lipid molar ratio of 1:12.5
試料状態
圧: ambient / 温度: 233 K
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NMR測定
放射
プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M
放射波長
相対比: 1
NMRスペクトロメーター
タイプ: Bruker DSX 400 / 製造業者: Bruker / モデル: DSX 400 / 磁場強度: 400 MHz
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解析
NMR software
名称
バージョン
開発者
分類
SIMPSON
Bak, Rasmussen, Nielsen
構造決定
MODELLER
6.1
Sali, Blundell
精密化
精密化
手法: Distance geometry; Simulated annealing / ソフトェア番号: 1 詳細: Two-spin REDOR curves were simulated using a Fortran program. Three-spin REDOR curves for the C -F experiment were simulated using the SIMPSON program. The input distances and angles in the ...詳細: Two-spin REDOR curves were simulated using a Fortran program. Three-spin REDOR curves for the C -F experiment were simulated using the SIMPSON program. The input distances and angles in the three-spin simulation were obtained from model building. The simulations assumed delta-function pulses for all pi pulses. Models that were potentially consistent with all the experimentally measured distances were created using MODELLER. In addition to the REDOR-based restraints, the input file included a restraint to preserve the intramolecular hydrogen bond ladder of each monomer, and a restraint to maintain monomer symmetry.
NMRアンサンブル
コンフォーマー選択の基準: least violations / 計算したコンフォーマーの数: 100 / 登録したコンフォーマーの数: 1