Physicochemical Properties of Peptide



PPepDB ID:PPepDB_641
Number of amino acids:37
Molecular Weight:3873.82 Da
Theoretical pI:8.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)616.22%
Cysteine CYS (C)12.7%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)12.7%
Glycine GLY (G)410.81%
Phynylalanine PHE (F)12.7%
Isoleucine ILE (I)25.41%
Histidine HIS (H)00%
Lysine LYS (K)25.41%
Methionine MET (M)00%
Leucine LEU (L)12.7%
Asparagine ASN (N)12.7%
Glutamine GLN (Q)38.11%
Proline PRO (P)25.41%
Serine SER (S)12.7%
Arginine ARG (R)00%
Threonine THR (T)410.81%
Tryptophan TRP (W)25.41%
Valine VAL (V)38.11%
Tyrosine TYR (Y)12.7%


Atomic Composition:


As there is at least one ambiguous position (B, J, X or Z) in the sequence considered, the atomic composition cannot be computed.


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    3.224,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    3.224,   assuming all CYS residues are reduced
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 18.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.03, 21.62, 18.92]

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:71.3513
Grand average of hydropathicity (GRAVY):0.00