Culture Secretary Lisa Nandy said the BBC must fight to restore trust after criticism that a Panorama documentary misled viewers by editing a speech by Donald Trump.
She said a review of the broadcaster's charter would ensure a "genuinely accountable" BBC, defending it as a "national institution".
BBC director general Tim Davie earlier told staff "we've got to fight for our journalism" after the US president's threat to sue the corporation for $1bn (£760m).
A leaked internal BBC memo said the Panorama film misled viewers by splicing together parts of Trump's speech on 6 January 2021 and made it appear as if he had explicitly encouraged the Capitol Hill riot. BBC chair Samir Shah has apologised.
Davie resigned on Sunday alongside BBC News CEO Deborah Turness after mounting pressure over that memo.
