Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1048
Number of amino acids:116
Molecular Weight:12620.03 Da
Theoretical pI:8.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)119.48%
Cysteine CYS (C)65.17%
Glutamic Acid GLU (E)76.03%
Aspartic Acid ASP (D)43.45%
Glycine GLY (G)43.45%
Phynylalanine PHE (F)43.45%
Isoleucine ILE (I)1412.07%
Histidine HIS (H)00%
Lysine LYS (K)119.48%
Methionine MET (M)43.45%
Leucine LEU (L)1210.34%
Asparagine ASN (N)86.9%
Glutamine GLN (Q)10.86%
Proline PRO (P)54.31%
Serine SER (S)119.48%
Arginine ARG (R)21.72%
Threonine THR (T)32.59%
Tryptophan TRP (W)10.86%
Valine VAL (V)76.03%
Tyrosine TYR (Y)10.86%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC562
HydrogenH931
NitrogenN143
OxygenO163
SulphurS10

FormulaC562H931N143O163S10
Total Number of Atoms:1809


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7365
Absorption 0.1% (=1 g/l)    0.584,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.554,   assuming all CYS residues are reduced
Aromaticity:0.052

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.38

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.62, 24.14, 29.31]

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:114.397
Grand average of hydropathicity (GRAVY):0.41