NMR paper Chemical shift assignments and folding topology of the Ras-binding domain of human Ra

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[NMR paper] Chemical shift assignments and folding topology of the Ras-binding domain of human Ra

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NMR processing:

MDD

NMR assignment:

Backbone:

Side-chains:

NOEs:

Structure from NMR restraints:

Ab initio:

Fragment-based:

Rosetta-NMR (Robetta)

Template-based:

GeNMR

I-TASSER

Refinement:

Amber

Structure from chemical shifts:

Fragment-based:

Homology-based:

Torsion angles from chemical shifts:

Preditor

TALOS

Promega- Proline

Secondary structure from chemical shifts:

CSI (via RCI server)

TALOS

MICS caps, β-turns

d2D

PECAN

Flexibility from chemical shifts:

RCI

Interactions from chemical shifts:

HADDOCK

Chemical shifts re-referencing:

NMR model quality:

NOEs, other restraints:

Chemical shifts:

RDCs:

Pseudocontact shifts:

Protein geomtery:

SAVES2 or SAVES4

Quality Control Check

NMR spectrum prediction:

FANDAS

MestReS

V-NMR

Flexibility from structure:

Backbone S2

Methyl S2

B-factor

Molecular dynamics:

Gromacs

Amber

Antechamber

Chemical shifts prediction:

From structure:

Shiftx2

Sparta+

Camshift

CH3shift- Methyl

ArShift- Aromatic

ShiftS

Proshift

PPM

CheShift-2- Cα

From sequence:

Shifty

Camcoil

Poulsen_rc_CS

Disordered proteins:

MAXOCC

Format conversion & validation:

CCPN

From NMR-STAR 3.1

Validate NMR-STAR 3.1

NMR sample preparation:

Protein disorder:

DisMeta

Protein solubility:

Isotope labeling:

Solid-state NMR:

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08-22-2010, 03:33 AM

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Chemical shift assignments and folding topology of the Ras-binding domain of human Ra

Chemical shift assignments and folding topology of the Ras-binding domain of human Raf-1 as determined by heteronuclear three-dimensional NMR spectroscopy.

Related Articles Chemical shift assignments and folding topology of the Ras-binding domain of human Raf-1 as determined by heteronuclear three-dimensional NMR spectroscopy.

Biochemistry. 1994 Jun 28;33(25):7745-52

Authors: Emerson SD, Waugh DS, Scheffler JE, Tsao KL, Prinzo KM, Fry DC

Raf-1 is a 74-kDa serine-threonine kinase which serves as the immediate downstream target of Ras in the cell growth signal transduction pathway. Recent genetic and biochemical experiments have demonstrated that (1) Ras interacts directly with the amino-terminal domain of Raf and (2) residues 51-131 of the Raf sequence are sufficient to mediate this interaction [Vojtek, A. B., Hollenberg, S. M., & Cooper, J. A. (1993) Cell 74, 205-214]. We have expressed a corresponding segment of the human Raf sequence (Raf55-132) in Escherichia coli as a fusion with maltose binding protein. The fusion protein was purified by affinity chromatography and cleaved at a pre-engineered site with factor Xa protease to liberate the 78-residue fragment of Raf. Raf55-132 bound to Ras with high affinity in a competition assay with GAP. An unlabeled version of Raf55-132 was studied by 2D homonuclear NMR, and uniformly 15N- and 13C/15N-labeled versions of Raf55-132 were studied by 2D and 3D heteronuclear NMR. Nearly complete sequence-specific assignments were made for the backbone HN, H alpha, 15N, and 13C alpha resonances. NOEs were used to determine regions of secondary structure and the overall folding topology. Raf55-132 is an independently folded domain composed of a five-stranded beta-sheet, a three-turn alpha-helix, and possibly an additional one-turn helix. Its structure resembles that of ubiquitin, even though there is no more than 11% sequence homology between the two proteins.

PMID: 8011639 [PubMed - indexed for MEDLINE]

Source: PubMed

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