What causes the charge of an electron?

[adarsh]

Its just my view..
charge is a special interaction between particle.so we need to know the reason for this interaction.. obviously its not because of its mass.. my physics prof say its because of the spin ..may be right,
but what i believe is that charge is due to special arrangement of fundamental particles that build them(quark)..and any interaction is some disturbance caused to something.. for eg gravitation is the result of disturbance caused to space and time..now consider charge on an electron ,it not just develop attraction.. there is repulsion also.,so the special arrangement of fundamental particles makes like charge to repel and unlike charges to attract.