Hi Harry,

Maybe you could have a look at acetohydroxyacid synthase (AHAS). The
catalytic subunit (dimer) contains FAD, ThDP and Mg2+ bound to the dimer
interface. If you consider the holoenzyme complex (which consists of
multiple catalytic and regulatory subunits) AHAS is bound to ATP too. There
are several structures for both, the catalytic subunit and the holoenzyme
complex, in the PDB.

I hope that helps.

Best regards,

Mario

El vie, 20 de dic. de 2024 5:37 a. m., Harry Powell <
0000193323b1e616-dmarc-requ...@jiscmail.ac.uk> escribió:

> Hi folks
>
> I’m familiar with enzymes that have a single co-factor (for example haem
> in myoglobin [or in the individual chains in haemoglobins] or FAD in
> flavoproteins), but was wondering if there are examples of single-chain
> proteins that have multiple cofactors (or even multiple chain proteins that
> have multiple cofactors bound to a single chain)?
>
> I’m not bothered (at the moment) about proteins that have cofactors bound
> to different chains.
>
> I thought this would be a good place to ask…
>
> Harry
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