Here you are: IMGT Web resources > IMGT Repertoire (RPI) > RPI entries from gene to protein

IMGT reference sequences in FASTA format:

Nucleotide sequences with gaps

The FASTA header contains:
IMGT accession number | gene and allele name | species | functionality | exon name | domain name | domain type | alternative splicing (if it is) | partial (if it is) 
>M91647|FCGR1C*O1|Homo sapiens|F|EX1|
atgtggttcttgacaactctgctcctttggg
>M91647|FCGR1C*01|Homo sapiens|F|EX2|
ttccagttgatgggcaagtgg
>M91647|FCGR1C*01|Homo sapiens|F|EX3|[D1]|C-LIKE|
......................acaccacaaaggcagtgatcactttgcagcctccatgg
gtcagcgtgttccaa...gaggaaaccgtaaccttgcactgtgaggtgctccatctgcct
ggg.........agcagctccacacagtggtttctcaatggcacagcc............
...actcagacctcgacc..........................................
...............cccagctacagaatcacctctgccagtgtc......aatgacagt
ggtgaatacaggtgccagagaggtctc.................................
.....................tcagggcgaagtgaccccatacagctggaaatccacaga
g
>M91647|FCGR1C*01|Homo sapiens|F|EX4|[D2]|C-LIKE|
...............................gctggccactactgcaggtctccagcaga
gtcttcacg.........gaaggagaacctctggccttgaggtgtcatgcgtggaaggat
aag.........ctggtgtacaatgtgctttactatcgaaatggcaaagcc.........
...tttaagtttttccactgg.......................................
...............aattctaacctcaccattctgaaaaccaac......ataagtcac
aatggcacctaccattgctcaggcaaggga..............................
..................aagcatcactacacatcagcaggaatatcacaatacactgtg
aaag
>M91647|FCGR1C*01|Homo sapiens||EX6|
gcctccagttaccaactcctgtctggtttcatgtccttttctatctggcagtgggaataa
tgtttttagtgaacactgttctctgggtgacaatacgtaaagaactgaaaagaaagaaaa
agtggaatttagaaatctctttggattctggtcatgagaagaaggtaatttccagccttc
aagaagacagacatttagaagaagagctgaaatgtcaggaacaaaaagaagaacagctgc
aggaaggggtgcaccggaaggagccccagggggccacgtag