WebSphere MQ is now supported with TXSeries v8.1 on Linux. WebSphere MQ is already supported on other platforms with TXSeries v8.1. With support for WebSphere MQ on Linux, the new Enhanced Enterprise Integration with CKTI feature is also supported with the Linux version of TXSeries v8.1.
On Linux, you will need WebSphere MQ 7.5.0.3 as a pre-requisite. Also, on the TXSeries side, you will need InterimServiceFix1 on top of TXSeries v8.1.

Here's a quick look at the excerpt from the system requirements page,

You can find the detailed system requirements for Linux at http://www-01.ibm.com/support/docview.wss?uid=swg21656675