Likert Scale scoring – can I assign negative scores?

I am going to conduct a survey with a 4-point Likert scale. The questions are divided into headers. The responses will be scored and each header will be given a score.

I would like to know if its ok to assign negative scores to the Likert scale E.G.:

Strongly Agree: 2
Agree: 1
Disagree: -1 
Strongly Disagree: -2

or should i just go with positive numbers:

Strongly Agree: 4
Agree: 3
Disagree: 2 
Strongly Disagree: 1

I would like to know which one is a better practice and what are the implications of each method.