Find the structure of trp repressor complexed with its operator from PDB. List the following information:(1) ID number, (2) Auther, (3) Resolution, (4) How many residues in one monomer, (5) How many cofactors in whole complex. Show the complex molecule on your homepage. Show different color for different chain in cartoon form. Indicate all the cofactors in spacefill form and blue color. Show the script that makes the final picture.
ANSWER:

(1).1TRO

(2).Z.OTWINOWSKI, P.G.ZHANG, P.B.SIGLER

(3).1.9 Angstroms

(4).108 residues

2. ARC REPRESSOR

Transtription of the ant gene during lytic growth of bacteriophage P22 is regulated by the cooperative binding of two Arc repressor dimmer to a 21-base-pair operator site. Please find the co-crystal structure of this Arc tetramer-operator complex from PDB.
(a)Make an animation of whole complex.
(b)Show the DNA sequence of the Arc reperssor.
(c)Show three sidechains(gln9,asn11,arg13) from onemonomer and corresponding DNA bases of them on your homepage.Color the different sidechains with different color. Measure the distance between possible hydrogen bonds.