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The Datafile PD-CD 5
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DATAFILE_PDCD5.iso
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rasmol
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hemoglob
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!Hemoglob
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HB-ALPH2_S
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Text File
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1996-02-25
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2KB
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83 lines
zap
load "1hho.pdb" #to reset palette, since group coloring hogged all colors
wireframe off
restrict 99-117:b
cartoon
color green
zoom 150
center selected
script clrleg.scr
echo HERE IS A SINGLE ALPHA HELIX.
pause
cartoon off
backbone 0.3
zoom 500
rotate z -10
translate y 25
echo THE BACKBONE REPRESENTATION CONNECTS ALPHA CARBON POSITIONS.
echo THE GREEN LINES DO NOT REPRESENT THE POSITIONS OF ANY ACTUAL
echo CHEMICAL BONDS.
pause
select 99-117:b and backbone
color cpk
backbone off
wireframe 0.3
script clrleg.scr
echo HERE ARE THE ACTUAL BONDS OF THE ALPHA HELIX BACKBONE:
echo THREE-ATOM REPEATS OF
echo . (NITROGEN - ALPHA CARBON - CARBOXY CARBON)
echo . BLUE GRAY RED-GRAY
pause
hbonds 0.2
color hbonds magenta
echo HYDROGEN BONDS (ORANGE) STABILIZE THE ALPHA HELIX.
pause
select 99-117:b
wireframe 0.3
echo THE SIDECHAINS ON THE ALPHA CARBONS ARE SHOWN IN GREEN.
pause
color cpk
script clrleg.scr
echo NOW THE SIDECHAIN ELEMENTS ARE IDENTIFIED:
echo C=GRAY, N=BLUE, O=RED, SULFUR=YELLOW (HYDROGENS ARE MISSING).
pause
reset
rotate z -10
spacefill
zoom 200
translate y 0
center selected
script clrleg.scr
echo NOTE THE FREQUENT OXYGENS (RED) AND NITROGENS (BLUE)
echo ON THIS SURFACE OF THE ALPHA HELIX. THIS SIDE OF
echo THE HELIX FACES THE WATER AT THE SURFACE OF THE PROTEIN.
pause
select selected and backbone
color black
echo
echo THE BACKBONE HAS BEEN BLACKED-OUT.
pause
script x90-3.scr
echo THE OPPOSITE SURFACE OF THE HELIX IS HYDROPHOBIC.
echo IT FACES THE INSIDE OF THE PROTEIN, WHERE THERE IS
echo LITTLE WATER, INTERACTING WITH HYDROPHOBIC AMINO
echo ACIDS ON OTHER HELICES.
pause
reset
zoom 200
rotate z -10
center selected
rotate y 90
echo THIS END VIEW SHOWS THE DIFFERENCES BETWEEN SIDES.
pause