Print columns that start with a specific string

With awk:

awk '{for(i=5;i<=NF;i++){if($i~/^ANC=/){a=$i}} print $1,$2,$3,$4,a}' file

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• for(...) loops through all fields, starting with field 5 (i=5).
  • if($i~/^ANC=/) checks if the field starts with ANC=
  • a=$i if yes, set variable a to that value
• print $1,$2,$3,$4,a print fields 1-4 followed by whatever is stored in a.

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Can be combined with BEGIN {OFS="\t"} of course.