Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5883
Number of amino acids:168
Molecular Weight:18294.92 Da
Theoretical pI:4.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1710.12%
Cysteine CYS (C)84.76%
Glutamic Acid GLU (E)148.33%
Aspartic Acid ASP (D)95.36%
Glycine GLY (G)95.36%
Phynylalanine PHE (F)63.57%
Isoleucine ILE (I)84.76%
Histidine HIS (H)21.19%
Lysine LYS (K)127.14%
Methionine MET (M)52.98%
Leucine LEU (L)137.74%
Asparagine ASN (N)95.36%
Glutamine GLN (Q)63.57%
Proline PRO (P)42.38%
Serine SER (S)127.14%
Arginine ARG (R)52.98%
Threonine THR (T)95.36%
Tryptophan TRP (W)00%
Valine VAL (V)169.52%
Tyrosine TYR (Y)42.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC792
HydrogenH1278
NitrogenN214
OxygenO255
SulphurS13

FormulaC792H1278N214O255S13
Total Number of Atoms:2552


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):23
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    6460
Absorption 0.1% (=1 g/l)    0.353,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.326,   assuming all CYS residues are reduced
Aromaticity:0.060

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.00

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.98, 20.24, 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:86.488
Grand average of hydropathicity (GRAVY):-0.06