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Table 1 Description of C. elegans – human orthologs. The Swiss-Prot accession numbers are given for the worm sequences and their human orthologs. TM: the number of transmembrane regions predicted using the consensus of nine different methods in the SFINX tool. Bootstrap support (%) is given for the inferred speciation node in the phylogenetic tree constructed using PHYLOWIN with PAM distances. Identity (%): sequence percentage identity from the Blastp output between the C. elegans gene and the nearest human ortholog. Four of the worm genes are predicted to have two splice variants (a and b). However, there are only small differences in the protein sequences between the two variants, except for R155.1. Splice variant R155.1b is predicted to have a truncation of more than one hundred amino acids in the N-terminus compared to R155.1a. The PF03062 domain (MBOAT) is still present in both splice variants. The protein sequence for R155.1a was used in the phylogenetic analysis.

From: Functional characterization in Caenorhabditis elegans of transmembrane worm-human orthologs

C. elegans orthologs

TM

Pfam-A domains

Human orthologs

Bootstrap support (%)

Identity (%)

Nearest human ortholog with putative function

C30H6.2 (Q9XVR4)

6

PF02535 (ZIP)

Q9H6T8, Q9NXC4, Q96NN4

57

50

Q9H6T8: SLC39A4, involved in intestinal absorption of zinc.

T11F9.2a (Q8I4G0), T11F9.2b (Q22395)

7

PF02535 (ZIP)

Q15043, Q96SM9, Q9C0K1, Q96BB3

91

30

Q9C0K1: BIGM103, involved in intracellular zinc retention and accumulation.

H13N06.5 (Q9XTQ7)

9

PF02535 (ZIP)

Q92504

98

52

Transport of zinc out of ER2 and other intracellular stores.

T28F3.31 (Q9XUC4)

7*

PF02535 (ZIP)

Q92504

79

38

Transport of zinc out of ER2 and other intracellular stores.

T01D3.5 (Q9XVJ5)

8

PF02535 (ZIP)

Q9NUM3

99

38

Function unknown.

F40F9.1a (Q8MQ56), F40F9.1b (Q8MQ55)

7

PF01027 (UPF0005)

Q9BWQ8, Q969X1

70

39

Q9BWQ8: Lifeguard protein, protects cells from Fas-mediated cell death.

F40F9.2 (Q20241)

7

PF01027 (UPF0005)

Q9BWQ8, Q969X1

70

40

Q9BWQ8: Lifeguard protein, protects cells from Fas-mediated cell death.

F08F1.7 (O17388)

9*

PF02990 (EMP70)

Q99805

100

62

Endosomal integral membrane protein.

ZK858.6a (Q94422)

9

PF02990 (EMP70)

Q92544

100

53

Function unknown.

ZK858.6b (Q7YTF9)

9*

     

F14F3.3 (Q19468)

9

PF03062 (MBOAT)

Q96N66, Q99908

100

27

Q99908: BB1 protein, malignant cell expression-enhanced gene.

R155.1a (O01925)

8

PF03062 (MBOAT)

Q92980

100

32

Function unknown.

R155.1b (Q86DC4)

4

     

C36B1.12 (Q93346)

9*

PF04258 (Peptidase_A22B)

Q8TCT7, Q8TCT8, Q8IUH8

100

30

Q8TCT7: Presenilin-like protein, may act as intra-membrane protease.

sft-4(Q18864)

7

PF02077 (SURF4)

O15260

100

55

Surfeit locus protein 4, probable ER2 integral membrane protein.

D2013.10 (O62126)

6

None

Q15055

98

53

Function unknown.

T04A8.12 (Q22141)

6

None

Q9UHJ9

50

35

FRAG1 (FGFR (fibroblast growth factor receptor) activating gene 1).

Y6B3B.10 (Q9XWE9)

6

PF03798 (LAG1)

P27544

99

37

Function unknown.

ZK721.1 (Q9GYF0)

10*

None

Q9NXL6, Q9Y357

97

34

Function unknown.

  1. 1 T28F3.3 was initially included because of strong similarity to Q92504; however, the phylogenetic analysis showed that it is probably an outparalog to the human gene.
  2. 2 ER = endoplasmic reticulum.
  3. * predicted to have a N-terminal signal peptide.