HHsearch alignment for GI: 254780843 and conserved domain: TIGR00886
>TIGR00886 2A0108 nitrite transporter; InterPro: IPR004737 This family represents nitrate/nitrite antiporters in bacteria, fungi, algae and marine diatoms. Nitrate transporters in Escherichia coli are involved in excretion of nitrite produced by the dissimilatory reduction of nitrate. NarK is polytopic membrane protein with 12 transmembrane domains which is involved in nitrate uptake and nitrite excretion and is thought to function as a nitrate/nitrite antiporter. At low concentrations of nitrate, NarK mediates the electrogenic excretion of nitrite rather than nitrate/nitrite exchange. This process prevents intracellular accumulation of toxic levels of nitrite and allows further detoxification in the periplasm through the action of nitrite reductase . In the opportunistic fungal pathogen Aspergillus fumigatus the nitrate transporter crnA clusters with nitrite reductase (niiA) and nitrate reductase (niaD). NiaD, niiA and crnA are induced by nitrate and repressed by ammonium at the transcriptional level . In Hebeloma cylindrosporum the nitrate transporter polypeptide (NRT2) is characterised by 12 transmembrane domains and presents both a long putative intracellular loop and a short C-terminal tail, two structural features which distinguish fungal high-affinity transporters from their plant homologues. Transcription is repressed by ammonium and strongly stimulated by nitrate but also by organic nitrogen or nitrogen deficiency. ; GO: 0015103 inorganic anion transmembrane transporter activity, 0015698 inorganic anion transport, 0016021 integral to membrane.
Probab=98.76 E-value=2.6e-07 Score=52.92 Aligned_cols=115 Identities=16% Similarity=0.127 Sum_probs=82.5
Q ss_pred CCCCCCHHHHHHHHHHHHHHHHHHCCCCCCCCCHHHCCCHHHHHHHHHHHHHHHHHHCC-----HHHHHHHHHHHHHHHH
Q ss_conf 12221012468889999876431001111110000000001245555456768996223-----3689999999999999
Q gi|254780843|r 265 DTLHLDGISAGQHTAIYWGSAMIGRFIGTWILSRFSAEKTLCAFATTACSLVILSSYTT-----GFISGWSLIAVGLFNS 339 (420)
Q Consensus 265 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-----~~~~~~~~~~~g~~~~ 339 (420)
T Consensus 32 ~dl~Ls~~Q~~~~~~~p~~~g~~~R~~~G~l~d~~GpR~~~~~~~~~~~IP~~~~~~~~~~p~~s~~~L~~~rlf~Gi~G 111 (472)
T TIGR00886 32 DDLGLSTAQLGNLVAVPVLAGAVLRIILGFLVDKFGPRKTTTLSLLLLAIPCLLAGLAVQDPSTSYSVLLLLRLFIGIAG 111 (472)
T ss_pred CCCCCCHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHHHHHHHHCCCCCCCHHHHHHHHHHHHHHH
T ss_conf 33147999999999999999999999988634776718999999999999999998412689989999999999996755
Q ss_pred HHHHHHHHHHHHHHHHH-HHHHHHHHH-HHHHHHH----HHH---HHHH
Q ss_conf 99999999999630156-569999999-9999999----999---9999
Q gi|254780843|r 340 IMFPTIFSLASASLEDQ-ASGGSGIIC-TTISGGV----IIP---LGVG 379 (420)
Q Consensus 340 ~~~~~~~~~~~~~~~~~-~~~~~~~~~-~~~~g~~----i~p---~i~G 379 (420)
T Consensus 112 g~Fa~~~~~~s~fFp~~~~GtA~gl~aG~GN~G~~~~~~~~Pa~f~i~~ 160 (472)
T TIGR00886 112 GSFASCMPWISFFFPKKIQGTALGLAAGWGNMGGGVAQFVMPALFAIIA 160 (472)
T ss_pred HHHHHHHHHHHCCCCCCHHHHHHHHHHCHHHHHHHHHHHHHHHHHHHHH
T ss_conf 4688766566306882201467588614326789999999999999999