Multi-tissue transcriptomics of the black widow spider reveals expansions, co-options, and functional processes of the silk gland gene toolkit

Table 2 Putative gene families that include at least five silk-specific transcripts (SSTs)

Fam ID^a	# SSTs	# nSSTs^b	# eCPM < 1	Family description^c	UniProt ID^c
3	27	0	2	Aggregate spider web glue 2 (AgSG2)	B7SVM7
5	25	3	1	Egg case silk protein-1 (also spidroins)	Q52P73
7	8	9	7	Astacin-like metalloprotease	E7D164
9	9	13	0	Papilin	G0WRZ9
12	8	10	3	Serine protease inhibitor 28	G6DTM3
15	8	4	6	L. hesperus putative uncharacterized protein (Apolipoprotein from PFAM)	E7D1R3
16	13	2	2	L. hesperus putative uncharacterized protein (protease inhibitor from alternative UniProt)	E7D1V7
19	12	0	1	L. hesperus Putative uncharacterized protein (Aggregate gland Silk Factor 2^d)	E7D1G4
24	11	0	1	No Annotation (Glycine Rich)	NA
45	5	2	0	L. hesperus putative uncharacterized protein	E7D1H3
49	5	0	1	No Annotation (Glycine Rich)	NA
65	5	0	1	L hesperus putative Uncharacterized protein	E7D1H1

^aFamily IDs were assigned to clusters generated by BLASTCLUST.
^bNon silk specific transcripts (nSSTs).
^cFrom BLASTX of UATs against UniProtKB, using the optimal hit in the family as decided by E-score.
^dFrom BLASTP of translated UATs against published L. hesperus sequences.

ISSN: 1471-2164