Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5578
Number of amino acids:116
Molecular Weight:11440.47 Da
Theoretical pI:9.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1512.93%
Cysteine CYS (C)97.76%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)10.86%
Glycine GLY (G)1412.07%
Phynylalanine PHE (F)10.86%
Isoleucine ILE (I)76.03%
Histidine HIS (H)00%
Lysine LYS (K)65.17%
Methionine MET (M)21.72%
Leucine LEU (L)97.76%
Asparagine ASN (N)65.17%
Glutamine GLN (Q)43.45%
Proline PRO (P)86.9%
Serine SER (S)119.48%
Arginine ARG (R)32.59%
Threonine THR (T)76.03%
Tryptophan TRP (W)00%
Valine VAL (V)119.48%
Tyrosine TYR (Y)21.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC491
HydrogenH825
NitrogenN141
OxygenO149
SulphurS11

FormulaC491H825N141O149S11
Total Number of Atoms:1617


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):1
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    3480
Absorption 0.1% (=1 g/l)    0.304,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.260,   assuming all CYS residues are reduced
Aromaticity:0.026

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.47

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.86, 33.62, 22.41]

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:94.2241
Grand average of hydropathicity (GRAVY):0.50