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) 
>M23317|CD3E*01|Homo sapiens|F|EX1|
atgcagtcgggcactcactggagagttctgggcctctgcctcttatcag
>M23318|CD3E*01|Homo sapiens|F|[D]|EX2|C-LIKE|
ttggtgtttgggggcaagatg
>M23319|CD3E*01|Homo sapiens|F|[D]|EX3|C-LIKE|
..........gtaatgaagaaatgg
>M23320|CD3E*01|Homo sapiens|F|[D]|EX4|C-LIKE|
gtggtattacacagacac
>M23321|CD3E*01|Homo sapiens|F|[D]|EX5|C-LIKE|
.catataaagtctccatctctgga..................accacagtaatattgaca
tgccctcagtatcctgga..................tctgaaatactatggcaacacaat
gataaaaacataggcggtgatgaggatgataaaaacataggcagtgat............
....................................gaggatcacctgtcactgaaggaa
ttttcagaa...ttggagcaaagtggttattatgtctgctaccccagaggaagc......
...aaaccagaagatgcgaacttttatctctacctgagggcaagag
>L34846|CD3E*01|Homo sapiens|F|[D]|EX6|
tgtgtgagaactgcatggagatggatgtgatgtcggtggccacaattgtcatagtggaca
tctgcatcactgggggcttgctgctgctggtttactactggagcaagaatagaaaggcca
aggccaagcctgtgacacgaggagcgggtgctggcggcaggcaaaggg
>M23322|CD3E*01|Homo sapiens|F|EX7|
gacaaaacaaggagaggccaccacctgttcccaacccagactat
>M23323|CD3E*01|Homo sapiens|F|EX8|
gagcccatccggaaaggccagcgggacctgtattctggcctgaatcagagacgcatctga
>X03884|CD3E*02|Homo sapiens|F|EX1|
atgcagtcgggcactcactggagagttctgggcctctgcctcttatcag
>X03884|CD3E*02|Homo sapiens|F|[D]|EX2|C-LIKE|
ttggcgtttgggggcaagatg
>X03884|CD3E*02|Homo sapiens|F|[D]|EX3|C-LIKE|
..........gtaatgaagaaatgg
>X03884|CD3E*02|Homo sapiens|F|[D]|EX4|C-LIKE|
gtggtattacacagacac
>X03884|CD3E*02|Homo sapiens|F|[D]|EX5|C-LIKE|
.catataaagtctccatctctgga..................accacagtaatattgaca
tgccctcagtatcctgga..................tctgaaatactatggcaacacaat
gataaaaacataggcggtgatgaggatgataaaaacataggcagtgat............
....................................gaggatcacctgtcactgaaggaa
ttttcagaa...ttggagcaaagtggttattatgtctgctaccccagaggaagc......
...aaaccagaagatgcgaacttttatctctacctgagggcaagag
>X03884|CD3E*02|Homo sapiens|F|[D]|EX6|
tgtgtgagaactgcatggagatggatgtgatgtcggtggccacaattgtcatagtggaca
tctgcatcactgggggcttgctgctgctggtttactactggagcaagaatagaaaggcca
aggccaagcctgtgacacgaggagcgggtgctggcggcaggcaaaggg
>X03884|CD3E*02|Homo sapiens|F|EX7|
gacaaaacaaggagaggccaccacctgttcccaacccagactat
>X03884|CD3E*02|Homo sapiens|F|EX8
gagcccatccggaaaggccagcgggacctgtattctggcctgaatcagagacgcatctga