Collapse Parent Keyboard Shortcut

I use the keyboard to navigate my lists. Sometimes it is cumbersome to have to push up a bunch of times to go to and close the parent node. So, for efficiency think it would be useful to have a keyboard shortcut that closes the immediate parent of the active node. By default the command to toggle the current node’s list is CTRL+. so maybe make the shortcut CTRL+SHIFT+. to close the current parent.