Sains Malaysiana 47(2)(2018): 309-318
http://dx.doi.org/10.17576/jsm-2018-4702–13
A Comparative Study between Tilapia
(Oreochromis niloticus)
By-product and Tilapia Protein Hydrolysate on Angiotensin I-converting
Enzyme (ACE) Inhibition Activities and Functional Properties
(Kajian Perbandingan antara Hidrolisat Protein Bahan Sampingan Tilapia
dan Otot Tilapia (Oreochromis niloticus)
terhadap Perencatan Enzim Pengubah Angiotensin (ACE) dan Sifat
Kefungsian)
JUMARDI ROSLAN1, SITI MAZLINA MUSTAPA KAMAL2*, KHAIRUL FAEZAH MD.
YUNOS2 & NORHAFIZAH ABDULLAH3
1Faculty of Food Science and Nutrition, Universiti
Malaysia Sabah, Jalan UMS, 88400 Kota
Kinabalu, Sabah Negeri di Bawah Bayu, Malaysia
2Department of Process and Food Engineering, Faculty
of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
3Department of Chemical and Environmental Engineering,
Faculty of Engineering
Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
Diserahkan: 6 Disember 2016/Diterima: 17 Julai 2017
ABSTRACT
Tilapia
is a popular freshwater fish and among the important cultured fish grown worldwide. In this
study, fish protein hydrolysate was produced from tilapia (Oreochromis
niloticus) by-product
(TB) and tilapia muscle (TM) through enzymatic hydrolysis using alcalase. The
TB and TM protein hydrolysates were evaluated for its characteristics in terms
of angiotensin I-converting enzyme (ACE) inhibition activity, peptide size
distribution, and functional properties. Hydrolysis for 1 h for TB and TM successfully produced low
molecular weight peptides (<14.2kDa) with the highest ACE inhibitory
activities. The findings also demonstrated that both samples have high nitrogen
solubility (>80% at pH2-9) and good emulsifying, water and oil holding
capacities. The study indicated that tilapia protein hydrolysates have the
potential to be used as functional food products.
Keywords: Aangiotensin
I-converting enzyme (ACE) inhibition activity; functional properties; Tilapia
by-product protein hydrolysate; tilapia
muscle protein hydrolysate
ABSTRAK
Tilapia
(Oreochromis niloticus) merupakan ikan air tawar terkenal dan
antara ikan terpenting yang diternak di seluruh dunia. Dalam kajian ini,
hidrolisat protein ikan telah dihasilkan daripada bahan sampingan tilapia (TB)
dan otot tilapia (TM) melalui hidrolisis berenzim menggunakan alkalase. Hidrolisat protein TB dan TM dinilai ciri-cirinya daripada segi
aktiviti perencatan enzim pengubah angiotensin (ACE), taburan saiz peptida dan
sifat kefungsian. Hidrolisis selama 1 jam berjaya menghasilkan peptida
dengan berat molekul rendah (<14.2kDa) dengan aktiviti perencatan ACE
yang tertinggi. Keputusan penemuan juga menunjukkan bahawa
kedua-dua hidrolisat protein mempunyai kelarutan nitrogen yang tinggi (>80%
pada pH2-9), dan kapasiti mengemulsi, memegang air dan memegang minyak yang
baik. Kajian ini menunjukkan bahawa hidrolisat protein
tilapia mempunyai potensi untuk digunakan sebagai produk makanan berfungsi.
Kata kunci: Hidrolisat protein bahan sampingan
tilapia; hidrolisat protein otot tilapia; perencatan aktiviti enzim pengubah angiotensin (ACE); sifat kefungsian
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*Pengarang untuk surat-menyurat; email: smazlina@upm.edu.my