Physicochemical Properties of Peptide



PPepDB ID:PPepDB_736
Number of amino acids:93
Molecular Weight:9878.5 Da
Theoretical pI:6.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)88.6%
Cysteine CYS (C)66.45%
Glutamic Acid GLU (E)88.6%
Aspartic Acid ASP (D)22.15%
Glycine GLY (G)1010.75%
Phynylalanine PHE (F)11.08%
Isoleucine ILE (I)66.45%
Histidine HIS (H)11.08%
Lysine LYS (K)77.53%
Methionine MET (M)11.08%
Leucine LEU (L)1111.83%
Asparagine ASN (N)44.3%
Glutamine GLN (Q)00%
Proline PRO (P)44.3%
Serine SER (S)55.38%
Arginine ARG (R)33.23%
Threonine THR (T)66.45%
Tryptophan TRP (W)00%
Valine VAL (V)66.45%
Tyrosine TYR (Y)44.3%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC433
HydrogenH709
NitrogenN115
OxygenO133
SulphurS7

FormulaC433H709N115O133S7
Total Number of Atoms:1397


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):10
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    6335
Absorption 0.1% (=1 g/l)    0.641,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.603,   assuming all CYS residues are reduced
Aromaticity:0.054

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.12

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.11, 24.73, 30.11]

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:98.6023
Grand average of hydropathicity (GRAVY):0.12