replace header in a file with list of lines in another file

I have a fasta file contained ~28000 sequence. I want to replace header of these sequences by a list of lines in another file. Example: File 1: sp|B7UM99|TIR_ECO27 MPIGNLGNNVNGNHLIPPAPP..... sp|P0ACF8|HNS_ECOLI MSEALKILNNIRTLRAQ........ sp|P24232|HMP_ECOLI MLDAQTIATVKATIPLLVET.......... File 2: sp|B7UM99|TIR_ECO27OS=Escherichia coli sp|P0ACF8|HNS_ECOLI=Human sp|P24232|HMP_ECOLI=Flavohemoprotein Desired Output: sp|B7UM99|TIR_ECO27OS=Escherichia coli MPIGNLGNNVNGNHLIPPAPP..... sp|P0ACF8|HNS_ECOLI=Human MSEALKILNNIRTLRAQ........ sp|P24232|HMP_ECOLI=Flavohemoprotein MLDAQTIATVKATIPLLVET..........