SI APPENDIX. for Polyunsaturated fatty acid saturation by gut lactic acid bacteria affecting host lipid composition

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1 SI APPENDIX for Polyunsaturated fatty acid saturation by gut lactic acid bacteria affecting host lipid composition Shigenobu Kishino, Michiki Takeuchi, Si-Bum Park, Akiko Hirata, Nahoko Kitamura, Jun Kunisawa, Hiroshi Kiyono, Ryo Iwamoto, Yosuke Isobe, Makoto Arita, Hiroyuki Arai, Kazumitsu Ueda, Jun Shima, Satomi Takahashi, Kenzo Yokozeki, Sakayu Shimizu, Jun Ogawa * * Corresponding author: Jun Ogawa, ogawa@kais.kyoto-u.ac.jp 1

2 SI text Structural analysis of trans-10,cis-12-cla The structure of trans-10,cis-12-cla was confirmed by GC-MS and NMR analyses. Mass spectra of pyrrolidide derivatives of the isolated fatty-acid methyl ester showed the same mass fragments pattern of pyrrolidide derivatives as commercially available trans-10,cis-12-cla methyl ester (Figure S9). Furthermore, 1 H-NMR and DQF-COSY also suggested one partial structure as -CH 2 -CH=CH-CH=CH-CH 2 - (Figure S9). Coupling constants between H-10 and H-11 and between H-12 and H-13 were J = ~15 Hz and J = ~11 Hz, respectively, indicated that the 10 double bond was in the trans configuration and the 12 double bond was in the cis configuration [ 1 H NMR d H (CDCl 3 ): 6.29 (1H, dd, J = 11.6, 15.7 Hz, -CH=CH-CH=, H-11), 5.94 (1H, dd, J = 11.0, 11.0 Hz, =CH-CH=CH-, H-12), 5.65 (1H, dt, J= 15.1, 7.3 Hz, -CH 2 -CH=CH-, H-10), 5.30 (1H, dt, J = 10.8, 7.6 Hz, -CH=CH-CH 2 -, H-13), 3.67 (3H, s, -OCH 3 ), 2.30 (2H, t, J = 7.6 Hz, -C(=O)-CH 2 -CH 2 -, H-2), 2.15 (2H, dt, J = 6.3, 7.2 Hz, =CH-CH 2 -CH 2 -, H-14), 2.10 (2H, dt, J = 7.1, 6.5 Hz, -CH 2 -CH 2 -CH=, H-9), (18H, m, -CH 2 -CH 2 -CH 2 -, H-3, H-4, H-5, H-6, H-7, H-8, H-15, H-16, and -CH 2 -CH 2 -CH 3, H-17), 0.89 (3H, t, J = 7.0, -CH 2 -CH 3, H-18)]. Based on the results of these spectral analyses, the isolated fatty acid was identified as trans-10,cis-12-octadecadienoic acid (trans-10,cis-12-cla) (Figure S9). Structural analysis of 10-oxo-cis-12-octadecenoic acid The structure of 10-oxo-cis-12-octadecenoic acid was confirmed by GC-MS and NMR analyses. Mass spectra of the isolated fatty-acid methyl ester identified the isolated fatty acid as 10-oxo-12-octadecenoic acid. 1 H-NMR and DQF-COSY also suggested one partial structure as -CH 2 -C(=O)-CH 2 -CH=CH-CH 2 - (Figure S10). The coupling constant between H-12 and H-13 was J = 10.8 Hz, indicated that the 12 double bond was in the cis configuration [ 1 H NMR d H (CDCl 3 ): 5.59 (1H, dt, J = 10.8, 7.1 Hz, -CH=CH-CH 2 -, H-13), 5.53 (1H, dt, J = 10.8, 7.0 Hz, -CH 2 -CH=CH-, H-12), 3.15 (2H, d, J = 6.8 Hz, -C(=O)-CH 2 -CH=, H-11), 2.43 (2H, t, J = 7.5 Hz, -CH 2 -CH 2 -C(=O)-, H-9), 2.35 (2H, t, J= 7.5 Hz, HOOC-CH 2 -CH 2 -, H-2), 2.03 (2H, dt, J = 7.3, 7.1 Hz, =CH-CH 2 -CH 2 -, H-14), 1.63 (2H, tt, J = 7.4, 7.4 Hz, -CH 2 -CH 2 -CH 2 -, H-3), 1.56 (2H, tt, J = 7.3, 7.3 Hz, -CH 2 -CH 2 -CH 2 -, H-8), (14H, m, -CH 2 -CH 2 -CH 2 -, H-4, H-5, H-6, H-7, H-15, H-16, and -CH 2 -CH 2 -CH 3, H-17), 0.89 (3H, t, J = 7.0 Hz, -CH 2 -CH 3, H-18)]. 2

3 Based on the results of these spectral analyses, the isolated fatty acid was identified as 10-oxo-cis-12-octadecenoic acid (Figure S10). Structural analysis of 10-oxo-trans-11-octadecenoic acid The structure of 10-oxo-trans-11-octadecenoic acid was confirmed by GC-MS and NMR analyses. Mass spectra of the isolated fatty-acid methyl ester identified the isolated fatty acid as 10-oxo-11-octadecenoic acid. 1 H-NMR and DQF-COSY also suggested one partial structure as -CH 2 -C(=O)-CH=CH-CH 2 - (Figure S11). The coupling constant between H-11 and H-12 was J = 15.9 Hz, indicated that the 11 double bond was in the trans configuration [ 1 H NMR d H (CDCl 3 ): 6.83 (1H, dt, J = 15.9, 6.9 Hz, -CH=CH-CH 2 -, H-12), 6.09 (1H, d, J = 15.9 Hz, -C(=O)-CH=CH-, H-11), 2.52 (2H, t, J = 7.5 Hz, -CH 2 -CH 2 -C(=O)-, H-9), 2.34 (2H, t, J = 7.5 Hz, HOOC-CH 2 -CH 2 -, H-2), 2.21 (2H, dt, J = 6.8, 6.8 Hz, =CH-CH 2 -CH 2 -, H-13), 1.61 (4H, m, -CH 2 -CH 2 -CH 2 -, H-3, H-8), 1.46 (2H, tt, J = 7.4 Hz, -CH 2 -CH 2 -CH 2 -, H-14), (14H, m, -CH 2 -CH 2 -CH 2 -, H-4, H-5, H-6, H-7, H-15, H-16, and -CH 2 -CH 2 -CH 3, H-17), 0.89 (3H, t, J = 6.9 Hz, -CH 2 -CH 3, H-18)]. Based on the results of these spectral analyses, the isolated fatty acid was identified as 10-oxo-trans-11-octadecenoic acid (Figure S11). Structural analysis of 10-hydroxy-trans-11-octadecenoic acid The structure of 10-hydroxy-trans-11-octadecenoic acid was confirmed by GC-MS and NMR analyses. Mass spectra of TMS derivatives of the isolated fatty-acid methyl ester identified the isolated fatty acid as 10-hydroxy-11-octadecenoic acid. 1 H-NMR and DQF-COSY also suggested one partial structure as -CH 2 -CH(OH)-CH=CH-CH 2 - (Figure S12). The coupling constant between H-11 and H-12 was J = 15.4 Hz, indicated that the 11 double bond was in the trans configuration [ 1 H NMR d H (CDCl 3 ): NMR d H (CDCl 3 ): 5.63 (1H, dt, J = 15.4, 6.7 Hz, -CH=CH-CH 2 -, H-12), 5.44 (1H, dd, J = 7.2, 15.4 Hz, -CH(OH)-CH=CH-, H-11), 4.12 (1H, dt, J = 7.2, 7.1 Hz, -CH 2 -CH(OH)-CH=, H-10), 2.33 (2H, t, J = 7.5 Hz, HOOC-CH 2 -CH 2 -, H-2), 2.02 (2H, dt, J = 7.0, 7.2 Hz, =CH-CH 2 -CH 2 -, H-13), 1.63 (2H, tt, J = 7.5, 7.3 Hz, -CH 2 -CH 2 -CH 2 -, H-3), 1.50 (2H, m, -CH 2 -CH 2 -CH(OH)-, H-9), (18H, m, -CH 2 -CH 2 -CH 2 -, H-4, H-5, H-6, H-7, H-8, H-14, H-15, H-16, and -CH 2 -CH 2 -CH 3, H-17), 0.87 (3H, t, J = 13.9 Hz, -CH 2 -CH 3, H-18)]. Based on the results of these spectral analyses, the isolated fatty acid was identified as 10-hydroxy-trans-11-octadecenoic acid (Figure S12). 3

4 Structural analysis of 10-oxo-octadecanoic acid The structure of 10-oxo-octadecanoic acid was confirmed by GC-MS analysis. Mass spectra of the isolated fatty-acid methyl ester identified the isolated fatty acid as 10-oxo-octadecanoic acid (Figure S13). Structural analysis of 10-hydroxy-octadecanoic acid The structure of 10-hydroxy-octadecanoic acid was confirmed by GC-MS analysis. Mass spectra of TMS derivatives of the isolated fatty-acid methyl ester identified the isolated fatty acid as 10-hydroxy-octadecanoic acid (Figure S14). Structural analysis of oleic acid and trans-10-octadecenoic acid For isolation of octadecanoic acids, extracted fatty acids were separated by thin-layer chromatography (TLC) using TLC Glass Plates (Silica Gel 60, Merck), using a solvent system of hexane/diethyl ether/acetic acid (60/40/1, by vol.). Fatty acids were detected under ultraviolet light (366 nm) after being sprayed with 0.01% primulin in 80% acetone. The extracted free fatty acids were methylated, and the resultant fatty-acid methyl esters were purified with a Shimadzu LC-VP system fitted with a Silver column Kanto ( mm, Kanto Chemical Co., Inc., Tokyo, Japan). The mobile phase was hexane-acetonitrile (99.9:0.1, by vol.) at a flow rate of 1.0 ml/min, and the effluent was monitored by ultraviolet detection (200 nm and 206 nm). Normal fatty acids were divided into trans-fatty acids, whose retention time was ~12 min, and cis-fatty acids, whose retention time was ~29 min. The methyl esters of purified fatty acids were transformed to pyrrolidide derivatives as described previously 20. The structure of trans-10-octadecenoic acid was confirmed by GC-MS analysis. Mass spectra of pyrrolidide derivatives of the purified trans fatty-acid methyl ester identified the purified trans fatty acid as trans-10-octadecenoic acid (Figure S15). The structure of cis-9-octadecenoic acid was confirmed by GC-MS analysis. Mass spectra of pyrrolidide derivatives of the purified cis fatty-acid methyl ester showed the same mass fragments pattern of pyrrolidide derivatives as commercially available cis-9-octadecenoic acid methyl ester. Based on the results of these analyses, the purified fatty acids were identified as trans-10- and cis-9-octadecenoic acids. 4

5 Figure S1 Pathway for conversion of 10-hydroxy-cis-12-octadecenoic acid by CLA-HY, and GC chromatograms of a) before and b) after the reaction. 5

6 Figure S2 Pathway for conversion of 10-hydroxy-cis-12-octadecenoic acid by CLA-DH, and GC chromatograms of a) before and b) after the reaction. 6

7 Figure S3 Pathway for conversion of 10-oxo-cis-12-octadecenoic acid by CLA-DC, and GC chromatograms of a) before and b) after the reaction. 7

8 Figure S4 Pathway for conversion of 10-oxo-trans-11-octadecenoic acid by CLA-ER, and GC chromatograms of a) before and b) after the reaction. 8

9 Figure S5 Pathway for conversion of 10-oxo-trans-11-octadecenoic acid by CLA-DH, and GC chromatograms of a) before and b) after the reaction. 9

10 Figure S6 Pathway for conversion of 10-oxooctadecanoic acid by CLA-DH, and GC chromatograms of a) before and b) after the reaction. 10

11 Figure S7 Pathway for conversion of 10-hydroxyoctadecanoic acid by CLA-HY, and GC chromatograms of a) before and b) after the reaction. 11

12 Figure S8 Pathway for conversion of 10-hydroxy-trans-11-octadecenoic acid by CLA-HY, and GC chromatograms of a) before and b) after the reaction. 12

13 Figure S9 Structural identification of trans-10,cis-12-octadecadienoic acid. a) The structure of trans-10,cis-12-octadecadienoic acid. b) GC-MS analysis of pyrrolidide derivative of commercially available trans-10,cis-12-octadecadienoic acid methyl ester. c) GC-MS analysis of pyrrolidide derivative of isolated trans-10,cis-12-octadecadienoic acid methyl ester. d) DQF-COSY of isolated trans-10,cis-12-octadecadienoic acid. 13

14 Figure S10 Structural identification of 10-oxo-cis-12-octadecenoic acid. a) The structure of 10-oxo-cis-12-octadecenoic acid. b) GC-MS analysis of 10-oxo-cis-12-octadecenoic acid methyl ester. c) DQF-COSY of 10-oxo-cis-12-octadecenoic acid. 14

15 Figure S11 Structural identification of 10-oxo-trans-11-octadecenoic acid. a) The structure of 10-oxo-trans-11-octadecenoic acid. b) GC-MS analysis of 10-oxo-trans-11-octadecenoic acid methyl ester. c) DQF-COSY of 10-oxo-trans-11-octadecenoic acid. 15

16 Figure S12 Structural identification of 10-hydroxy-trans-11-octadecenoic acid. a) The structure of 10-hydroxy-trans-11-octadecenoic acid. b) GC-MS analysis of TMS derivative of 10-hydroxy-trans-11-octadecenoic acid methyl ester. c) DQF-COSY of 10-hydroxy-trans-11-octadecenoic acid. 16

17 Figure S13 Structural identification of 10-oxooctadecanoic acid. a) The structure of 10-oxooctadecanoic acid. b) GC-MS analysis of 10-oxooctadecanoic acid methyl ester. 17

18 Figure S14 Structural identification of 10-hydroxyoctadecanoic acid. a) The structure of 10-hydroxyoctadecanoic acid. b) GC-MS analysis of TMS derivative of 10-hydroxyoctadecanoic acid methyl ester. 18

19 Figure S15 Structural identification of trans-10-octadecenoic acid. a) The structure of trans-10-octadecenoic acid. b) GC-MS analysis of pyrrolidide derivative of trans-10-octadecenoic acid methyl ester. 19

A novel unsaturated fatty acid hydratase toward C16 to C22 fatty acids from Lactobacillus

A novel unsaturated fatty acid hydratase toward C16 to C22 fatty acids from Lactobacillus acidophilus Akiko Hirata 1, Shigenobu Kishino 1,*, Si-Bum Park 2, Michiki Takeuchi 1, Nahoko Kitamura 1 and Jun