UPDATE 1-Deutsche Postbank unaware if Deutsche Bank to bid

* Deutsche Postbank unaware when, if Deutsche Bank to bid

* Deutsche Postbank sees Deutsche Bank as good parent

* Deutsche Bank declines to comment

* Postbank shares rise 4.3 pct

(adds detail, background)

FRANKFURT, Sept 9 (Reuters) - Deutsche Postbank (DPBGn.DE) Chief Executive Stefan Juette said Deutsche Bank (DBKGn.DE) is a good potential parent but said he was unaware whether Germany's flagship lender will increase its minority stake.

"We do not know when or how or even if this takeover will happen," Juette told a banking conference.

Deutsche Postbank shares rose 4.3 percent by 1255 GMT while the Stoxx European banking sector index .SX7P gained 2.2 percent.

Deutsche Bank, which owns just below 30 percent in the Bonn-based lender, needs to square the circle between avoiding a takeover before the onset of new Basel capital rules -- which will tighten lending -- and its desire to balance out a business model that relies heavily on investment banking.

Deutsche Bank declined to comment.

Consolidating Postbank would give Deutsche Bank access to Postbank's 14 million clients. Deutsche could take a majority in Postbank by February 2012 via a convertible bond deal it has with Deutsche Post (DPWGn.DE), which holds 39.5 percent in Postbank.

The disadvantage is that a takeover would eat up capital just before the onset of the new Basel III rules, which are set to take effect in 2013 and be phased in over years. [ID:nLDE6870JP] (Reporting by Edward Taylor; Editing by Michael Shields)