Only compute TM-score without performing a previous structural alignment

Dear all,

I've got a pair of proteins (with different sequences) which I have structurally aligned elsewhere. Now, I would like to calculate the TM-score between both proteins. I've tried TM-align and TM-score programs, but I've realized that both, previous to the actual calculation of the TM-score, they do an structural alignment first. Is there an option in either program to only calculate the TM-score without doing the alignment?

Cheers,

Sergio