Split colon-separated strings in one column into different columns in R

Question

data <- data.frame(col1 =c("FAAP20:NM_001256946:exon3:c.C376T:p.P126S","MAP3K6:NM_001297609:exon13:c.C1842A:p.N614K,MAP3K6:NM_004672:exon14:c.C1866A:p.N622K" ,"MAP3K6:NM_001297609:exon8:c.C1340T:p.T447I,MAP3K6:NM_004672:exon9:c.C1364T:p.T455I" ))
                col1
        1 FAAP20:NM_001256946:exon3:c.C376T:p.P126S
        2 MAP3K6:NM_001297609:exon13:c.C1842A:p.N614K,MAP3K6:NM_004672:exon14:c.C1866A:p.N622K
        3 MAP3K6:NM_001297609:exon8:c.C1340T:p.T447I,MAP3K6:NM_004672:exon9:c.C1364T:p.T455I

I want to know how to separate col1 into four columns like the following.

                       col1                          col2          col3     col4     col5                                                           
    1 FAAP20:NM_001256946:exon3:c.C376T:p.P126S    NM_001256946    exon3   c.C376T   p.P126S
    2 MAP3K6:NM_001297609:exon13:c.C1842A:p.N614K  NM_001297609    exon13  c.C1842A  p.N614K
    3 MAP3K6:NM_001297609:exon8:c.C1340T:p.T447I   NM_001297609    exon8   c.C1340T  p.T447I