Table of Contents
The Ramachandran diagram.
Allowed phi and psi torsion angles in proteins.
The Ramachandran diagram of Gly residues
in a polypeptide chain.
PPT Slide
Stereo space-filling representation of an a helical segment of sperm whale myoglobin (its E-helix) as determined by X-ray crystal structure analysis.
The hydrogen bonding pattern of several polypeptide helices.
Comparison of the two polypeptide helices that occasionally occur in proteins with the commonly occurring a helix.
b pleated sheet: antiparallel orientation
b pleated sheets: parallel orientation
A two-stranded b antiparallel pleated sheet drawn to
emphasize its pleated appearance.
Stereo space-filling representation of the 6-stranded antiparallel b pleated sheet in jack bean concanavalin A as determined by crystal X-ray analysis.
Polypeptide chain folding in proteins illustrating the right-handed twist of b sheets: bovine carboxypeptidase A.
Polypeptide chain folding in proteins illustrating the right-handed twist of b sheets: chicken muscle triose phosphate isomerase.
(b barrel)
Connections between adjacent polypeptide strands
in b pleated sheets.
Origin of a right-handed crossover connection.
Reverse turns in polypeptide chains.
Space-filling representation of an û loop comprising residues 40 to 54 of cytochrome c.
The structure of a keratin.
The two-stranded coiled coil: view down the coil axis showing the interactions between the nonpolar edges of the a helices.
The two-stranded coiled coil: side view in which the polypeptide back bone is represented by skeletal (left) and
space-filling (right) forms.
The amino acid sequence at the C-terminal end of the triple helical region of the bovine a1(I) collagen chain.
The triple helix of collagen.
X-Ray structure of the triple helical collagen model peptide (Pro-Hyp-Gly)10 in which the fifth Gly is replaced by Ala. (a) Ball and stick representation.
X-Ray structure of the triple helical collagen model peptide (Pro-Hyp-Gly)10 in which the fifth Gly is replaced by Ala. (b) View along helix axis.
X-Ray structure of the triple helical collagen model peptide (Pro-Hyp-Gly)10 in which the fifth Gly is replaced by Ala. (c) A schematic diagram.
A biosynthetic pathway for
cross-linking Lys, Hyl, and
His side chains in collagen.
X-Ray diffraction photograph of a single crystal of
sperm whale myoglobin.
Electron density maps of proteins (heme of sperm whale myoglobin) (2 angstrom resolution)
Electron density maps of proteins (sperm whale myoglobin)
(2.4 angstrom resolution)
Sections through the electron density map of diketopiperazine calculated at the indicated resolution.
The 2D proton NMR structures of proteins: a NOESY spectrum of a protein presented as a contour plot with
two frequency axes w1 and w2.
The 2D proton NMR structures of proteins: NMR structure of a 64-residue polypeptide comprising the Src protein SH3 domain.
Representations of the X-ray structure of sperm whale myoglobin: the protein and its bound heme are drawn in stick form.
Representations of the X-ray structure of sperm whale myoglobin: a diagram in which the protein is represented by its computer-generated Ca backbone.
Representations of the X-ray structure of sperm whale myoglobin: a computer-generated cartoon drawing.
The X-ray structure of jack bean protein concanavalin A.
Human carbonic anhydrase.
The x-ray structure of horse heart cytochrome c.
(hydrophobic residues in red)
The x-ray structure of horse heart cytochrome c.
(hydrophilic residues in green)
Representations of the x-ray structure of sperm whale myoglobin: a diagram in which the protein is represented by its computer-generated Ca backbone.
The H helix of sperm whale myoglobin. (a) A helical wheel representation in which the side chain positions about the a helix are projected down the helix axis onto a plane.
The H helix of sperm whale myoglobin: a skeletal model.
(orange = nonpolar; purple = polar)
The H helix of sperm whale myoglobin: a space-filling model.
A space-filling model of an antiparallel b sheet from
concanavalin A.
One subunit of the enzyme glyceraldehyde-3-phosphate dehydrogenase from Bacillus stearothermophilus.
Schematic diagrams of supersecondary structures.
Schematic diagrams of supersecondary structures.
X-ray structures of 4-helix bundle proteins:
E. coli cytochrome b562.
X-ray structures of 4-helix bundle proteins:
human growth hormone.
X-ray structure of the immunoglobulin fold.
X-ray structure of retinol binding protein.
X-ray structure of the C-terminal domain of bovine g-b crystallin: a topological diagram showing how its two Greek key motifs are arranged in a b barrel.
X-ray structure of the C-terminal domain of bovine g-b crystallin: the 83-residue peptide backbone displayed in ribbon form.
X-ray structure of the enzyme, peptide-N4-(N-acetyl-b-D-glucosaminyl)asparagine amidase F from Flavobacterium meningosepticum.
X-ray structure of the enzyme, peptide-N 4-(N-acetyl-b-D-glucosaminyl)asparagine amidase F from Flavobacterium meningosepticum.
The X-ray structure of the 247-residue enzyme triose phosphate isomerase (TIM) from chicken muscle.
Topological diagrams of (a) carboxypeptidase A and (b) the N-terminal domain of glyceraldehyde-3-phosphate dehydrogenase.
X-ray structures of open b sheet-containing enzymes: dogfish lactate dehydrogenase, N-terminal domain (residues 20-163 of this 330-residue protein).
X-ray structures of open b sheet-containing enzymes: porcine adenylate kinase (195 residues).
Doubly wound sheets.
A GRASP diagram of human growth hormone
(helps predict protein interactions with charged molecules)
Thermodynamic changes for transferring hydrocarbons from water to nonpolar solvents at 25°C.
Hydropathy Scale for Amino Acid Side Chains
Hydropathic index plot for bovine chymotrypsinogen.
Protein denaturation
curve
Melting temperature of RNase A as a function
of the concentration of various salts.
PPT Slide
The quaternary structure of hemoglobin
Some possible symmetries of proteins with identical protomers. (a) Assemblies with the cyclic symmetries C2, C3, and C5.
Some possible symmetries of proteins with identical protomers. (b) Assemblies with the dihedral symmetries D2, D4, and D3.
Some possible symmetries of proteins with identical protomers. (c) Assemblies with T, O, and I symmetries.
A dimer of transthyretin as viewed down its twofold axis (red lenticular symbol).
X-ray structure of glutamine synthetase from Salmonella typhimurium - view down 6-fold symmetry axis
X-ray structure of glutamine synthetase from Salmonella typhimurium - view down one of the 2-fold symmetry axes
A helical structure composed of a single kind of subunit.
Chemical cross-linking agents.
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