TeXVerbatim

TeXVerbatim["str"]
converted to TeX gives verbatim str.
TeXVerbatim can be used to define formatting using Format:
Assign TAdjustmentBox[E, BoxBaselineShift -> 0.5, BoxMargins -> {{-0.3, 0}, {0, 0}}]X formatting for a symbol:
Formatting is used when symbol is converted to TAdjustmentBox[E, BoxBaselineShift -> 0.5, BoxMargins -> {{-0.3, 0}, {0, 0}}]X: