Sublime Text Surround Text in backticks or quotes.

For ' single quotes or " double quotes.

Select the text and type either character to enclose the selected text with that character.

Enclosing with backtick works by adding this code to Preferences -> Key Bindings as seen on this gist

{ "keys": ["`"], "command": "insert_snippet", "args": {"contents": "`${0:$SELECTION}`"}, "context":
    { "key": "setting.auto_match_enabled", "operator": "equal", "operand": true },
    { "key": "selection_empty", "operator": "equal", "operand": false, "match_all": true }

You can also select multiple words and apply the character to surround it.

Sublime Text Surround Text in Backticks