Matches in SemOpenAlex for { <https://semopenalex.org/work/W2083313128> ?p ?o ?g. }
- W2083313128 endingPage "7458" @default.
- W2083313128 startingPage "7448" @default.
- W2083313128 abstract "We have studied carbon monoxide (CO) migration and binding in the nonsymbiotic hemoglobins AHb1 and AHb2 of Arabidopsis thaliana using Fourier transform infrared (FTIR) spectroscopy combined with temperature derivative spectroscopy (TDS) at cryogenic temperatures. Both proteins have similar amino acid sequences but display pronounced differences in ligand binding properties, at both physiological and cryogenic temperatures. Near neutral pH, the distal HisE7 side chain is close to the heme-bound ligand in the majority of AHb1-CO molecules, as indicated by a low CO stretching frequency at 1921 cm(-1). In this fraction, two CO docking sites can be populated, the primary site B and the secondary site C. When the pH is lowered, a high-frequency stretching band at approximately 1964 cm(-1) grows at the expense of the low-frequency band, indicating that HisE7 protonates and, concomitantly, moves away from the bound ligand. Geminate rebinding barriers are markedly different for the two conformations, and docking site C is not accessible in the low-pH conformation. Rebinding of NO ligands was observed only from site B of AHb1, regardless of conformation. In AHb2, the HisE7 side chain is removed from the bound ligand; rebinding barriers are low, and CO molecules can populate only primary docking site B. These results are interpreted in terms of differences in the active site structures and physiological functions." @default.
- W2083313128 created "2016-06-24" @default.
- W2083313128 creator A5003705399 @default.
- W2083313128 creator A5013283684 @default.
- W2083313128 creator A5040075727 @default.
- W2083313128 creator A5046034242 @default.
- W2083313128 creator A5053509268 @default.
- W2083313128 creator A5090651055 @default.
- W2083313128 date "2010-08-12" @default.
- W2083313128 modified "2023-10-16" @default.
- W2083313128 title "Ligand Migration and Binding in Nonsymbiotic Hemoglobins of <i>Arabidopsis thaliana</i>" @default.
- W2083313128 cites W1500927176 @default.
- W2083313128 cites W1529656734 @default.
- W2083313128 cites W1966312962 @default.
- W2083313128 cites W1967767687 @default.
- W2083313128 cites W1968872901 @default.
- W2083313128 cites W1969629579 @default.
- W2083313128 cites W1969700436 @default.
- W2083313128 cites W1971751730 @default.
- W2083313128 cites W1972574238 @default.
- W2083313128 cites W1973306432 @default.
- W2083313128 cites W1974396570 @default.
- W2083313128 cites W1978126416 @default.
- W2083313128 cites W1979214212 @default.
- W2083313128 cites W1980225394 @default.
- W2083313128 cites W1980936727 @default.
- W2083313128 cites W1982104189 @default.
- W2083313128 cites W1982770060 @default.
- W2083313128 cites W1983565918 @default.
- W2083313128 cites W1983755004 @default.
- W2083313128 cites W1984126415 @default.
- W2083313128 cites W1988122552 @default.
- W2083313128 cites W1990591893 @default.
- W2083313128 cites W1995595718 @default.
- W2083313128 cites W1998183609 @default.
- W2083313128 cites W1999205445 @default.
- W2083313128 cites W2001786349 @default.
- W2083313128 cites W2003514439 @default.
- W2083313128 cites W2004607866 @default.
- W2083313128 cites W2004826935 @default.
- W2083313128 cites W2006058557 @default.
- W2083313128 cites W2007800651 @default.
- W2083313128 cites W2009047341 @default.
- W2083313128 cites W2015984697 @default.
- W2083313128 cites W2017644006 @default.
- W2083313128 cites W2019450703 @default.
- W2083313128 cites W2026247264 @default.
- W2083313128 cites W2027659453 @default.
- W2083313128 cites W2028608113 @default.
- W2083313128 cites W2032243066 @default.
- W2083313128 cites W2036635330 @default.
- W2083313128 cites W2037948861 @default.
- W2083313128 cites W2038418348 @default.
- W2083313128 cites W2040355223 @default.
- W2083313128 cites W2042996646 @default.
- W2083313128 cites W2044866035 @default.
- W2083313128 cites W2045159840 @default.
- W2083313128 cites W2052596157 @default.
- W2083313128 cites W2056335544 @default.
- W2083313128 cites W2058123618 @default.
- W2083313128 cites W2058905092 @default.
- W2083313128 cites W2061737406 @default.
- W2083313128 cites W2063284939 @default.
- W2083313128 cites W2063896140 @default.
- W2083313128 cites W2067561176 @default.
- W2083313128 cites W2068124482 @default.
- W2083313128 cites W2073047726 @default.
- W2083313128 cites W2074439199 @default.
- W2083313128 cites W2075092972 @default.
- W2083313128 cites W2075333740 @default.
- W2083313128 cites W2075917539 @default.
- W2083313128 cites W2077248139 @default.
- W2083313128 cites W2079115013 @default.
- W2083313128 cites W2082308187 @default.
- W2083313128 cites W2083960792 @default.
- W2083313128 cites W2085220028 @default.
- W2083313128 cites W2087589304 @default.
- W2083313128 cites W2087915796 @default.
- W2083313128 cites W2095166900 @default.
- W2083313128 cites W2098500343 @default.
- W2083313128 cites W2104666616 @default.
- W2083313128 cites W2109725841 @default.
- W2083313128 cites W2110327245 @default.
- W2083313128 cites W2113045591 @default.
- W2083313128 cites W2121068877 @default.
- W2083313128 cites W2121967553 @default.
- W2083313128 cites W2125252235 @default.
- W2083313128 cites W2125637986 @default.
- W2083313128 cites W2133709520 @default.
- W2083313128 cites W2141872725 @default.
- W2083313128 cites W2150229358 @default.
- W2083313128 cites W2153778612 @default.
- W2083313128 cites W2154725664 @default.
- W2083313128 cites W2161257885 @default.
- W2083313128 cites W2326255223 @default.
- W2083313128 cites W246860301 @default.
- W2083313128 cites W4231956143 @default.
- W2083313128 cites W4251950018 @default.