Early Growth Response Protein 1 (EGR1)

Zif268 is a mammalian transcription factor that is now officially known as Egr1.It was originally discovered in mouse. The protein encoded by this gene belongs to the EGR family of C2H2-type zinc-finger proteins. It is a nuclear protein and functions as a transcriptional regulator. The products of target genes it activates are required for differentiation and mitogenesis. Studies suggest this is a tumor suppressor gene.The DNA binding domain of Zif268 consists of three zinc finger domains of the Cys2His2 type. The amino acid structure of the Zif268 zinc finger domain is given in this table, using the single letter amino acid code. The fingers 1 to 3 are indicated by f1 - f3. The residues marked 'x' are not part of the zinc fingers, but rather serve to connect them all together.