PER CURIAM.
On December 3, 2001, Victor B. Perkins filed a notice of appeal. We dismiss the appeal for lack of jurisdiction because there was no district court order being appealed. This court may exercise jurisdiction only over final orders, 28 U.S.C. § 1291 (1994), and certain interlocutory and collateral orders, 28 U.S.C. § 1292 (1994); Fed.R.Civ.P. 54(b); Cohen v. Beneficial Indus. Loan Corp., 337 U.S. 541, 69 S.Ct. 1221, 93 L.Ed. 1528 (1949).
The district court’s subsequent entry of final judgment did not validate the notice of appeal because Perkins did not file the notice of appeal from a district court order. In addition, the informal brief filed in this court could not be construed as a notice of appeal because it was not the functional equivalent of such a notice. Fed. R.App. P. 3(c); Smith v. Barry, 502 U.S. 244, 248, 112 S.Ct. 678, 116 L.Ed.2d 678 (1992).
We deny a certificate of appealability and dismiss the appeal as interlocutory. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before the court and argument would not aid the decisional process.
DISMISSED.