HHsearch alignment for GI: 254780709 and conserved domain: cd00879
>cd00879 Sar1 Sar1 subfamily. Sar1 is an essential component of COPII vesicle coats involved in export of cargo from the ER. The GTPase activity of Sar1 functions as a molecular switch to control protein-protein and protein-lipid interactions that direct vesicle budding from the ER. Activation of the GDP to the GTP-bound form of Sar1 involves the membrane-associated guanine nucleotide exchange factor (GEF) Sec12. Sar1 is unlike all Ras superfamily GTPases that use either myristoyl or prenyl groups to direct membrane association and function, in that Sar1 lacks such modification. Instead, Sar1 contains a unique nine-amino-acid N-terminal extension. This extension contains an evolutionarily conserved cluster of bulky hydrophobic amino acids, referred to as the Sar1-N-terminal activation recruitment (STAR) motif. The STAR motif mediates the recruitment of Sar1 to ER membranes and facilitates its interaction with mammalian Sec12 GEF leading to activation.
Probab=96.87 E-value=0.0028 Score=43.37 Aligned_cols=98 Identities=16% Similarity=0.218 Sum_probs=52.8
Q ss_pred CCCCCCEEECCCCCCCCHHHHHHHHHHHHHHCCCCEEEEECCCCCHHHHHHHHHHHHHHCCCCCCCCCCCCCHHHHHHHH
Q ss_conf 36674123113544444247899999998522674267743451245688999997530353212235866124542289
Q gi|254780709|r 107 FSHRPHVILVVGVNGVGKTTVIGKLSKKMSDAGLKVMLAAGDTFRSAAIDQLKIWADRTSADFVCSEIGSDAAALAYEAF 186 (321)
Q Consensus 107 ~~~~p~vil~vG~nG~GKTTT~aKLA~~~~~~g~kV~lva~DtfR~aA~eQL~~~a~~~~v~~~~~~~~~dp~~v~~~a~ 186 (321)
T Consensus 15 ~~~k~~kIlilGld~aGKTTil~~l~-----~~~~~~~----------------------~PT~Gfn------------~ 55 (190)
T cd00879 15 LYNKEAKILFLGLDNAGKTTLLHMLK-----DDRLAQH----------------------VPTLHPT------------S 55 (190)
T ss_pred CCCCCCEEEEEECCCCCHHHHHHHHH-----CCCCCEE----------------------CCCCCCC------------E
T ss_conf 65770489999069998899999980-----7995315----------------------2655874------------5
Q ss_pred HHHHHHCCCEEEEECCCCCCCHHHHHHHHHHHHHHHHCCCCCCCCEEEEECCCCCCHHHHHHHHHHHHH
Q ss_conf 999651487599865433321157789999899876302223430112310233522577899987643
Q gi|254780709|r 187 KQAQAKKVDVLIIDTAGRLHNNSILMAGIGKMIRVLKRLDPHAPHSVLQVLDATTGQNALRQVEMFHAV 255 (321)
Q Consensus 187 ~~a~~~~~DvvliDTAGR~~~~~~lm~EL~ki~~v~~~~~~~~p~~~~lVlda~~gq~~~~~a~~F~~~ 255 (321)
T Consensus 56 e~i~~~~~~~~~wDvgG~~~~-R~lW----------~~Y~~-~~~~iIfVVDssD~~r~~eak~~L~~l 112 (190)
T cd00879 56 EELTIGNIKFKTFDLGGHEQA-RRLW----------KDYFP-EVDGIVFLVDAADPERFQESKEELDSL 112 (190)
T ss_pred EEEEECCEEEEEEECCCCCCC-CCCH----------HHHHH-CCCEEEEEEECCCHHHHHHHHHHHHHH
T ss_conf 999989999999989998455-5438----------88843-113799999776778999999999999