Lysine to Arginine, If I got that K2R correctly. Yes, R will affect the ATP binding capacity. In my research molecule, people have found that ERCC2 K48R mutation can affect the ATP binding capacity. Wait, I can give you some reference.
1) R.B. Kalish, D.P. Nguyen, S. Vardhana, M. Gupta, S.C. Perni, S.S. Witkin, A single nucleotide A>G polymorphism at position -670 in the Fas gene promoter: relationship to preterm premature rupture of fetal membranes in multifetal pregnancies, Am J Obstet Gynecol. 192(1) (2005) 208-212.