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Alan Tom

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	==About this Structure==		==About this Structure==

	GCN4 (PDB [[2zta]] by itself, [[1ysa]] bound to DNA) is a eukaryotic transcription factor first isolated from yeast. It is composed of two identical 52 residue alpha helix chains that grouped together to form a dimer. The dimer binds through interlocking leucine amino acids in the C terminal ends, while pinching in on the major groove of DNA in the N terminal end. The X-ray structure of the 33-residue polypeptide corresponding to the leucine zipper of GCN4 was determined by Peter Kim and Thomas Alber. <ref ~~name="book"~~>Voet, Donald; Voet, Judith G.; Pratt, Charlotte W. Fundamentals of Biochemistry: Life at the Molecular Level. 3rd Ed. Hoboken, NJ: Wiley, 2008. </ref>.		GCN4 (PDB [[2zta]] by itself, [[1ysa]] bound to DNA) is a eukaryotic transcription factor first isolated from yeast. It is composed of two identical 52 residue alpha helix chains that grouped together to form a dimer. The dimer binds through interlocking leucine amino acids in the C terminal ends, while pinching in on the major groove of DNA in the N terminal end. The X-ray structure of the 33-residue polypeptide corresponding to the leucine zipper of GCN4 was determined by Peter Kim and Thomas Alber. <ref> Voet, Donald; Voet, Judith G.; Pratt, Charlotte W. Fundamentals of Biochemistry: Life at the Molecular Level. 3rd Ed. Hoboken, NJ: Wiley, 2008. </ref>