Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3549
Number of amino acids:17
Molecular Weight:1945.27 Da
Theoretical pI:8.6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)15.88%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)211.76%
Phynylalanine PHE (F)211.76%
Isoleucine ILE (I)211.76%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)15.88%
Glutamine GLN (Q)00%
Proline PRO (P)317.65%
Serine SER (S)00%
Arginine ARG (R)15.88%
Threonine THR (T)211.76%
Tryptophan TRP (W)00%
Valine VAL (V)15.88%
Tyrosine TYR (Y)211.76%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC93
HydrogenH133
NitrogenN21
OxygenO23
SulphurS1

FormulaC93H133N21O23S1
Total Number of Atoms:271


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):0
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    2980
Absorption 0.1% (=1 g/l)    1.532,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    1.532,   assuming all CYS residues are reduced
Aromaticity:0.235

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.81

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[41.18, 35.29, 0.00]

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:62.9411
Grand average of hydropathicity (GRAVY):0.22