Is this coin on any exchange yet? Any information about the team behind this project?

This is a new addition to the current masternode ponzi schemes that are growing rapidly. There is nothing new in this project, just using a copy pasta code. All pos coins are green and there are already plenty of good ones. Ethereum itself will go into PoS. Bitcoin is bitcoin, the more energy becomes expensive and inefficient, the more value is added to Bitcoin. That is the whole point of PoW. The early adopters of bitcoinGreen will dump on noobs at any point. Stay thousand miles away from this scam if you dont want to get dumped on. These people are clever, they are even using bitcoin's name to tinker with people's emotion. There is no connection between bitcoin and this project.

After a long time seeing a good project. Thanks to dev for bringing up a cool project like this. Best wishes.

Is it still possible to mine this coin?

The original devs who made this coins are all gone. Now only supporters are left. The current devs are self proclaimed and they seriously do not know anything about coding or running a coin. They do not even have access to their website (loooolzz). Signatum is breathing its last few breaths before having a hard crash and dead. Imagine it like a plane without any pilot and only with cabin crews who can only scream.

This is the shittiest community coin I have ever seen. Even the 'doc' has left the project. Soon gonna hit 10 satoshi range 

I am eyeing over this coin for long, hope this will soon get into big exchanges