Physicochemical Properties of Peptide



PPepDB ID:PPepDB_737
Number of amino acids:144
Molecular Weight:15238.6 Da
Theoretical pI:4.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)117.64%
Cysteine CYS (C)64.17%
Glutamic Acid GLU (E)139.03%
Aspartic Acid ASP (D)32.08%
Glycine GLY (G)96.25%
Phynylalanine PHE (F)32.08%
Isoleucine ILE (I)149.72%
Histidine HIS (H)10.69%
Lysine LYS (K)96.25%
Methionine MET (M)10.69%
Leucine LEU (L)1711.81%
Asparagine ASN (N)117.64%
Glutamine GLN (Q)21.39%
Proline PRO (P)64.17%
Serine SER (S)139.03%
Arginine ARG (R)10.69%
Threonine THR (T)117.64%
Tryptophan TRP (W)00%
Valine VAL (V)117.64%
Tyrosine TYR (Y)21.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC670
HydrogenH1107
NitrogenN171
OxygenO216
SulphurS7

FormulaC670H1107N171O216S7
Total Number of Atoms:2171


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    3355
Absorption 0.1% (=1 g/l)    0.220,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.196,   assuming all CYS residues are reduced
Aromaticity:0.035

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.06

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.64, 27.08, 29.17]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:113.75
Grand average of hydropathicity (GRAVY):0.28